Ok, so Adobe's "Enhance Speech" tool is pretty rad.

https://podcast.adobe.com/enhance

Enhance Speech from Adobe | Free AI filter for cleaning up spoken audio

This AI audio filter improves spoken audio to make it sound like it was recorded in a soundproofed studio.

Here's another one of me enhancing the built-in mic on my Canon camera, which sounds terrible and echo-y.

Not perfect audio, but this is something I could use for a YouTube video and I doubt anyone would even think I was using the onboard mic.

@birchtree Yeah. Freakishly better when the mic is (and I said this out loud along with you as I was listening to the first clip, kind of spooky 😂) “absolutely terrible.”