I already know about it, so there's no need to tell me.

https://www.google.com/search?q=why+shouldn%27t+you+use+apt+on+fedora&oe=UTF-8&hl=en-us&safe=active

It's a really bad idea to have two package managers overlap (this is also why more "cross-system" package managers like nix and brew are okay: they consciously install to separate paths to avoid overlapping)

Fedora does not offer APT repositories, so if you somehow don't overlap and pretty much exclusively use APT, you're pretty much just converting your distro to Debian (or whatever's providing your repos). In the forums we call this a Frankenstein; support is seldom given for raising the dead.