Playtest wanted

[eap314]

I trust (a bit too well) that I've made a good puzzle, but I would like to know if it is unique and what difficulty.
setter: 2 stars

This is a portion of an instructionless style sudoku hunt
The rules are only regions and solutions
meta-style deductions may be necessary

The solution to "Solutions" is assumed to not be 1, according to a future puzzle

https://sudokupad.app/jwjkjliok8

[eap314]

Hints for current playtesters:
What does the gray square mean in Grey with an E? Is it the same as the green and red in Gray with an A?
The extra square in Gray with an A means something. Do repeated solutions matter?
Where does the repeated digit go in Ambiguity?
If there's a repeated digit in Solutions, where does it go?
What can the solution to Plane be? It has to be placed in the gray cells in Solutions!

What do you currently think the region / solution rules are?

If you know the region rules (or you don't want to figure them out) you can try my puzzle to introduce the rule
https://logic-masters.de/Raetselportal/R...?id=000NJH