I have a Frostpunk key from Prime Gaming that I dont need and want to trade if possible. The genres I like are diverse and
I only ask for a 1:1 trade of equal or lesser value. Just a simple key for key trade. Thanks.

Dude, the key was -and still is, for December- free for Amazon Prime subscribers.
I really doubt a 1:1 trade is feasible - or fair.

I'd say just give it away, if you stick with the community you'll eventually get some in return eventually. Paying it forward! (If that's the expression).

I do consider giving it away too but I guess would rather ask first lol. Maybe somebody has an old key laying around for something they'd value cheaply to exchange is all I thought.

Fair, but still... despite the glory days being over since the big changes in the store management, the GOG community is generally very friendly. It's hard to see anybody asking for something in return, it is far easier to just gift and get gifted. I know, it's pretty weird - back when I joined I had an hard time believing it too, with all my trades failing while people randomly gifted me games.