Hi @Rick
It's not feasible to allow users to edit the shared notebook while preventing them from deleting a page.
I would suggest you submit feedback via Microsoft Feedback Forum: https://feedbackportal.microsoft.com/feedback/forum/c06dcc30-2e1c-ec11-b6e7-0022481f8472
Thanks for your understanding.
Besides, we are unable to block swiping to delete notebook on phones. Here is 1similar thread, you may vote it up.
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