PHP theme unyson

I plan to sell a theme with a unique design and according to all Envato rules. My design is made on Elementor, but I don’t know which framework I should choose fo creating php theme. I think I will choose Unyson. I have this question. Is there a starting theme for unyson? Sometimes i buy some themes to understand how they are created and I noticed that 2 different themes which are created with unyson has the same file hierarchy and the same php code, but it is has different designs and different authors. This to different themes has just different css but the same php code. Can Envato accept the same php theme just with different designs?

Thanks in advance