There is a Feedback button in the launcher, which remains open while you play the game. No screenshots though, as far as I've seen.
That's handy, but it still needs you to alt-tab out and load up your browser and stuff. I'd like them to cut out the middle clicks and keep it in-game. I'm already trying to reduce the number of programs I've got running at the same time as BG3, and putting a Feedback/Bugs button right there in the Esc menu screen begs them to be used more often, and used right when the bug happens.