Basically just posting pics for any advice and to reference:
Here is a reticulata x sugar apple from seeds a friend gave me, next to a reticulata seedling.
Here is a seedling sugar apple off my Na Dai tree.
Here is a seedling hybrid off my Na Dai tree I crossed with reticulata pollen or Lisa atemoya pollen. I had labeled the different flowers based on which pollen was used BUT some very windy days blew the colored coded markers off the tree 🤷♂️ I am leaning toward it being SA x Reticulata though. One thing I did notice when planting the seeds were that they were longer and thin like reticulata seeds (whether that holds true is my guess).
-Joep450