I use a derivative
Without Ubuntu Pro subscription the entire Universe repository does not receive any security updates by Canonical:
canonical.com/…/ubuntu-pro-enhanced-security-and-…
You should consider switching to an entirely independent distribution that does not lock security updates behind a paywall, perhaps something based directly on Debian or Fedora.
Fedora offers apt. AFAIK not by default, so it has to be installed via dnf first but then it’s available.
It’s been like that for years.
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.
www.google.com/search?q=why+shouldn't+you+use+apt…
Is your answer whatever Gemini happens to hallucinate on a given day?
https://www.google.com/search?q=why+shouldn%27t+you+use+apt+on+fedora+-ai
do yourself a favor and just block the overview: https://www.reddit.com/r/uBlockOrigin/comments/1crc47m/is_it_possible_to_use_ublock_to_remove_googles/