Lumun

My favorites for two are Carcasonne, Seven Wonders Duel, and classic Cribbage. Those first two aren’t exactly simple to learn though.

Another suggestion is to play a cooperative game with two. This can be really fun to talk about thr strategy together since you are on a team. For simpler, I like Forbidden Island and Forbidden Desert.

I love Seven Wonders Duel but I wouldn’t call it super accessible compared to something like Hive. There’s quite a lot to keep track of for the first few playthroughs. But for two people who are experienced with other games it has a good amount of replayability!