There are a few more things you can do:
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You can have a table with top groups, to display the same set of columns from the same table multiple times in the top:
Show multiple buttons in a cell w/ lookup? -
If you just want to display some static content (e.g. links, like in the 2nd Notion screenshot), you can simply use a table and hide all decorations:
How to create a menu for a website?
PSA: How to make columns equally wide