Another option - green burial - no casket, no embalming, etc., totally back to the earth, for FL. At this time, I plan on going to Prairie Creek Conservation Cemetery near Gainesville. They will take the body after it has been donated to science or organs donated. We visited them, saw the site & learned that many funeral home will handle the paperwork & transport.
If your folks want to be buried outside FL, just search for green burial and the state name. Good to think for the future.
https://www.wlrn.org/environment/2023-04-20/want-a-green-burial-in-florida-heres-what-you-need-to-know