Maybe try a soil analysis.
MySoil - Soil Test Kit | Grow The...
https://www.amazon.com/dp/B084TSNR79...p_mob_ap_share
My grass seems to prefer palm tree fertilizer which is low in nitrogen and high in micronutrients.
I had two large burnt spots on the west side of the house traced to turf melt. The low e widows were acting like magnifying glasses burning the grass.
Stop Turf From Melting with Anti Reflective Window Film
– Reflect Defense Window Film
I learned about this on a previous home where a neighbors window was melting my siding.