I think a lot of people agree with me on Minecraft being cozy, but some might not because of how prevalent combat is outside of Peaceful Mode. I personally find Minecraft cozy even off of Peaceful Mode, but this also might have to do with the fact that I usually play it with friends indoors, and I’ve done so on a rainy day with some hot cocoa and/or tea or something.
I personally really enjoyed Subnautica. The serene feeling of diving around while listening to found tapes, doing everything at you own speed, while learning to live in the local ecosystem.
Especially diving into the deep zones really makes me relax. Absolute darkness, only the light from your cockpit and the sounds of the beings which you cannot see. Sometimes the sound of the hull of your sub scraping against the obscure walls of the caverns. Navigating only using the way points that you set after carefully having probed the way using the smaller craft, which could not actually go the full depth.
And then I got the sonar upgrade, which kinda destroyed the vibe, so I disabled it when going deep.