We all love whiteboards but they represent a sort of chaos like sometimes you feel while zooming in and out. Your information is lost.
Now Xtiles is developed in Ukraine and the developers aptly say the app is a cross between Miro boards and Notion. Yes, indeed it is.
The zettelkasten apps though they have tab features are somewhat limited to opening a few notes. If you open many notes some kind of minutiae is lost in the overview.
Xtiles is an indefinitely nested document manager with an indefinite horizontal scrolling whiteboard. Xtiles is mainly promoted for content creators.
You can carry all your outlines, notes, images and links and then when you are writing a piece have everything on the same page or a tab away. You never have to switch to another app for reference.
I highly recommend you give xtiles a try! It has 300 cards free with all the features.†