I wish for the ability to set the generated tile to anything, recently Py was updated and has turned my background into tiles that I can select with my blueprint planner but before the Update I couldn't, so I wondered if it was possible to make that a setting for custom tile background.

That is unfortunate, but it is likely something that only Py can resolve (though I'm not sure why they did this, so I'm not sure if they'd undo it or do it differently). Technically, there may be ways to work-around that in this mod, but it would mean a lot of custom data/code that comes with maintenance and performance costs, so I'm not sure I'd like to do that. I'll investigate it, though, I've never tried Py's.