Differences between branch origin/main and origin/sd35

[danilomaiaweb]

Hey guys...
First of all, I apologize if my question is stupid
What are the differences between the two branches main and sd35?
In both we can use Flux, but in origin/main, we cannot use sd35
Is this the only difference?

What features are there in the branch origin/main that are not in origin/sd35?

Thank in advance