Yeah. I troll through old Wing Commander-like titles for good SteamDeck support every so often, but then I realize that I also want to play with 3 friends.
Whoever gets this done will get my money.
In the meantime, there's Empty Epsilon which is Star Trek, rather than Wing Commander; and there's Starlink: Battle For Atlas, which at least has solid local co-op on a docked Nintendo Switch (but is sadly buried in DRM on SteamDeck, while also badly overpriced.)
The guy behind Wing Commander (and my favorite game of all time, Privateer) has a mission based space flight game out next year. You can see the first hour of gameplay here: https://youtu.be/1H-0x4xk2Xk
Keep in mind, cutscenes are in-engine not pre-rendered.
Have you tried the original Everspace? It's a roguelike so it's basically randomised missions. Rebel Galaxy might also scratch the itch but it's more "naval" in it's combat - you move on a 2d plane and fire broadsides, rather than dogfighting.