I’m in the market to find a new distro that is similar enough to Fedora that switching won’t be as laborious as I’ve had it before. I keep hearing POP!_os is a good choice but I’m going to as the community what they think is good.
While that's true in theory, it's still very common to run Debian Testing on a desktop in practice. For a user coming from Fedora, there would likely be culture shock from the dated packages in Stable. Using Stable with Flatpaks+Nix would be more usable, but OP's experience does not sound like it would fit well with the effort/knowledge required for this solution.
I wouldn't recommend Sid to a less-experienced user and I didn't recommend Arch for a similar reason.