Kirby games. Many allow co-op so we can help with difficult parts but many games he's plowed through on his own with time.
Minecraft in creative mode
Minecraft legends of we sit and give strategic advice
Minecraft dungeons if we play co-op
Race with Ryan
Pikuniku
Any of the Lego games, especially when played co-op
Catlateral damage or as he calls it 'kitty karate'
New Super Lucky's tale
Unpacking, although someone should be nearby to help with unrecognized items
Katamari damacy, but the timer can make things stressful
Rush: A Disney Pixar adventure
Slime Rancher 2, this is another where the game is complex enough that an adult needs to by nearby to guide him on what the next task should be, remind him what critters like what food, etc.
He's just gotten big enough for VR games and really enjoys:
Vacation simulator
Tilt brush
The Lab, except the secret shop part
We let him try a lot of games but keep an eye on what they do to his mood. There are games he can play that we don't allow simply because of how quickly they frustrated him. We also spend a lot of time talking about why games are difficult at all, and how challenges are a key part of what make things interesting.
Here are a few my six year old loves:
He's just gotten big enough for VR games and really enjoys:
We let him try a lot of games but keep an eye on what they do to his mood. There are games he can play that we don't allow simply because of how quickly they frustrated him. We also spend a lot of time talking about why games are difficult at all, and how challenges are a key part of what make things interesting.