I have no UX expertise at all and I would say : who has objective UX arguments on whether this menu should be on the left ?
We cannot give UX opinion without user behavior info. So either we launch interviews in this field or we plug tools like matomo there. This is why I opened: Enable Matomo to measure backoffice and actions
(doing both would actually be the best way).
Once this is done we also need to make strategic decisions like: do we want the backend to be responsive?
If yes, the menu on the left will be necessary.
I had in mind that this would come with the next Spree updates but I didn’t had in mind the problems it raises, thanks for clearing that @luisramos0
So this can be the first step for an overhaul.
But at the same time I’m wondering: will a left menu change a lot the rest of the platform? Maybe having someone testing stuff could also be good. How did you wanted to proceed @luisramos0? Will you need some UI work to lean on?