Stardew Valley has to be the most stressful “cozy” game I’ve played. Busywork, 24h day with exhaustion mechanics, timed and seasonal events etc. Let me tend to my garden dammit!

Factorio is a lot more relaxing - just disable aliens and build your optimised factory in peace

Edit: protip - If you want a chill gardening game, get Starbound and some plant mods.