PC 200% ...unless you're going away. In that case: Laptop, Tablet, maybe SteamDeck? (anyone tried this?)
But if a phone is your only option: pick a suitable game (e.g. Degrees of Lewdity)
I'd choose something relaxing like Stardrew Valley or Animal Crossing.
Or build my own world in Mincraft until it's "perfect".
Will I have mod access in my postmortem world?