I myself am 100ish hours into AC Odyssey on the Steam Deck, looking forward to getting stabby on some malakas!
I was about halfway through Tears of the Kingdom, but then the Miyoo Minu Plus I had ordered a month ago was delivered and I spent the rest of the weekend playing Wario Land 2 and Super Mario Land 2. Nice blasts from the past and I really love the miyoo hardware.