i was trying to get the last split to be Abs Rad, but i can't seem to find it among the bosses, is it possible to have a abs rad split?

you dont need an ending autosplit, it will automatically split the final one when it detects an ending (in this case godhome ending)

theres also a website made by slaurent where you can download premade splits with autosplits, and theres also route notes for pretty much every category that exists

hksplitmaker.com