Call them back they should come out for free for the service call. Coke has phosphoric acid in it but not anywhere near 68% just look where it comes on the ingredient list. You need to have it snaked.

Waste Line
 

I have had the blockage issue once SOOO bad it required snake "Mike Scott" from the outside all the way to under my master. Both my toilets are on the Far Side of the house. I had already done the everything on etc. I told them what it was and just had them snake it from the outside. AVOID Charmin, and the ULTRA toilet papers. 2 years later with all of this I got some ultra T-P no other options that were not tissue paper. It started to be an issue again. Purchased Green Gobbler waste line cleaner at Home Depot. Gave it 6 hours without running the water. It is enzymes rather than acid. ALL Good. The waste lines in the 466A area are 4" mains which open to 6" mains on the street side of the house trap. Too much acid over time and the pipes will take a beating. Next house I want to make sure my toilets and house trap are on the same side of the house. They can also scope the line and see if there are any things there that should not be.

Plumber
 

Give our guy Mark the plumber a call. He’s honest for sure!
(847) 812-3528

If you live in a new construction village, we had that problem as well in most of our neighborhood.

We called community watch and Scott plumbing. The plumbers ending up calling Jacobs and they sent out the the large “vacuum” truck and cleaned out the main sewer lines in the streets,

Took care of the problem. They also checked the “joint” line from the 2 homes to the street.

I had the same problem and called a plumber. He turned on a faucet and went outside and took the cap off the drain access to see what was happening. There was very little water flowing so that meant a partial clog somewhere before the access. He ran a snake up the pipe and found a piece of cloth. Pulled that out and everything was fine.

I put Drano Max down our toilets & shower drain every 3 months plus take off metal drain off shower drain and clean out hair which clog up near to of drain: no issues for 10 yrs;Also pour 1 gallon of warm water with bleach down A/C drain every 2 monts;again no issues in 10 yrs; neighbors who didn't do it all have had plugging up issues; preventative maintenance = no need for a plumber; Good Luck

Same problem in a Grandview. First two times Mike Scott unseated the toilet and snaked the line. Nothing really found. They said next time they would bring a camera. Since then I have been successful turning on the sinks and shower and plunging the heck out of it, getting water on the floor. I have wondered if the slope of the drain is too little.

I started using RV toilet paper during Covid because it was always available in the camping section of Walmart. I think I will keep using it to help avoid issues like this.

Sluggish Drains and other problems
 

I am glad to know I am not the only one with with this situation. I have had back up even into the bathtub. I went to YouTube and several plumbers recommended putting very hot water (if water isn't too high) and then pouring in Dawn. The Dawn sinks down and after a while everything cleared.

I am in a CYV and wondering if you are. When I had a walk through with the plumber (4H Plumbing)13 years ago, he said that, due to the layout, the master bath would take a long time to heat. He was not kidding - it took a ton of water running a long time before it was even warm. Well, it turned out that the shower line was filled with sawdust and construction debris which, of course, slowed everything down.

Additionally, I had a leak in the pipes behind the wall twice. I have used Kiley and Sons and have been very satisfied with them. I am hoping I won't be needing them again any time soon.

Call a plumber?

Any TP over 2ply I.e.Charmin and any flushable wipes will clog toilets here. Call a plumber before you get flooded

Heavy plunging can push seal out. Flush after plunging.
Nice easy drain cleaner is baking soda and vinegar. Maybe 1/2 -1 cup of BS in or kit or bath opening and add 1/2+ cup vinegar. Watch it bubble.
Venting always possible but with inspected work, not probable unless a homeowner did his own work (might/might not be legal here in Florida)
Have cleared nests In stacks that reduced air flow. Very rare but happens.
I need to do this today: I like to allow the sink stoppers to sit ON TOP of the horizontal lift bar of the popup instead of being trapped so it can’t be removed.
It will still seat fine but easier to get baking soda in there.

We had same problem. Plummer found a separation in outside drain line. They dug in lawn found the separation made a new connection and we were good.

I recommend you the the sewer lines video scoped. It should only cost a couple of hundred dollars. This will show you exactly what's going on. You can have anything from a broken pipe, offset pipe joints, debris, grease buildup, etc. Before trying home made remedies it's best to see what is going on. Having the pipes, snaked, hydro jetted, or roto rootered could cause more damage depending on what going on.

Scotts 1000 single ply is the best.