move custom taxonomies from right sidebar to main container in post edit page

Which editor do you use? The handling is different for each one.

I suppose it’s Gutemberg, by blocks, where can I check it?

Does it look like this: https://i0.wp.com/developer.www.ads-software.com/files/2023/12/block-tutorial-1.png?ssl=1 ?

yes

There you can move some, but not all, boxes to the right using the arrows. This is saved on a user-specific basis. Unfortunately, I don’t think it works for taxonomies.

If you want it to look different when you call it up, you’ll have to check whether there’s a hook for the block editor at that point. There was an answer to this last year here: https://www.ads-software.com/support/topic/how-to-change-the-order-of-panels-in-the-gutenberg-sidebar/