It may be possible to make this work by adding custom code in the theme editor/ global style box. I did something similar to make the page tabs sticky and that is working great. I would not be surprised if this approach can work for your question (and yes, you are exactly right- this is a needed feature!). I’ll take a look when I have time but review my earlier post and give it a try: Floating Page Tab Menu | Feature Request - #3 by harry
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