i’m aware of teh rambam, this wouldn’t be the first time i saw a machlakos.
see
gemarah rosh hashanah 17a
sanhedrin 99a
bava metzia 58b
shaarei teshuvah, whole chapter, title is , the sins that ppl won’t come out of gehenim
chofetz chaim chovat hashemirah on ribis where he says they won’t have techias hamesim.