So much for joining the EU, I guess 🙄

So it’s only browser-based? No download, no installation to local machine? Or did I miss something?

Sorry, but NO. Scribus is a page layout app. It is not intended for image creation/manipulation. That is truly using a shoe for hammer, or a hammer for a screwdriver or a screwdriver for a butter knife.

You can use Word for page layout or image manipulation too. Again, screwdriver for a butter knife. Right tool for the job and all.