I don’t have a steam deck, but I can help you by skimming through my libraries and telling you the games I would play on it if I did:
Everhood
Stardew Valley
Disco Elysium
Blasphemous
Darkest Dungeon
The Messenger (this one is only good until the first half imo, still worth it)
Devil May Cry HD Collection
Resident Evil 1(the gamecube remake, classic)
Signalis
Yuppie Psycho
Streets of rage 4 (this one seems perfect for the deck)
Rain world
Dead Cells
Katana Zero
SYNTHETIK
I don’t know your tastes, but these are all great games that would probably work well with the portability and specs of the deck
I will be visiting Europe and figured I might as well order a steam deck to my hotel in the Netherlands. However, I will only be staying there from december 3rd to the 5th (I leave at 00:00 of the 6th). Acording to the estimated arrival, it should arrive in time, but is that prediction from Valve reliable at all? And if it does not ship in time, am I fucked?