Mechabellum
https://store.steampowered.com/app/669330/Mechabellum/
It is an auto-battler that you can get into for 15mins or 3hrs. I've been playing it on and off since I think 2023 (when Paradox released it).
Whatever you did in the previous round of the match you are stuck with, but you can add more units and tweak some things (there is an ability / card that lets you REDO one unit each round etc.).
Playing this game makes you realise fairly quickly exactly how many moves ahead your brain is capable of thinking!
In my particular case......it is not that many!