You might want to consider looking into what all the folks at the avlinux project support an are doing.

There was pinephone pro. I had one but lost it when I moved across the country. I loved it but unfortunately it wasn’t something that I could rely on because of a lack of proper deep sleep. Legit only had like 4 hours screenoff per charge and the lack of a usable camera was a bit of a bummer. I haven’t tried it in a few years now. I miss it despite its complete lack of practicality.

Nahh. Just use a live boot of the distro of your choice.