Solo Sandbox Game: Doable?

Greetings everyone.
Do you think a "sandbox game" would be doable in the Lost Omens setting?
I want to play a solo sandbox campaign, but I'm not sure what to do.
Thank you in advance for your time and answers.

Note: I'm not going to play Kingmaker, I've already played it as a CRPG.

Since your asking about Lost Omens, it makes me think you meant to ask in the context of PF2 instead of PF1.

Solo games are incredibly hard and unrewarding IMO being you're the player and the GM.

Personally I don't think they work at all, and I'd rather just play a CRPG.

you can solo any written adventure.
The real question is, "will it be fun?"
I think the vast majority would say 'no'.