This guy can take it from you: https://www.steamtrades.com/trade/LaIrQ/h-115-usd-65-tf2-keys-w-destiny-2-asiaeuna-for-other-region-ask-me
I saw that post but it was 11 months old =\
Also its Humble Bundle so there's no region restriction that i'm aware of; it just links to here https://support.humblebundle.com/hc/en-us/articles/360003766893
It has region restriction tied to Destiny 2 itself. Also the post itself might be 11 months old but you can see it is being bumped (and replied by the owner) fairly recently. Just go to him, he'll take it off your hands :)
P.S. We cannot see your message unless you specifically reply to us like how I'm doing it now
Check what region you live in, your key will be locked to that region only
https://support.activision.com/articles/en_US/FAQ/Destiny-2-PC-Region-Definitions
Destiny 2
Keys (pref tf2)
I don't think I'll be playing this, but I don't think I can use barter to trade it either, so here I am trying to remember how this site works :3