How to retake snapshots of a webpage

I purchased additional storage to be able to sync more files across devices.
Since for some files sync did not work, for PDF files I use the "Find fulltex" feature after deleting the broken PDF attachment to re-download the file if missing on a device.
However, this does not work for web pages.
Is there a "Retake snapshot" command/feature to replace a missing web page snapshot attachment?
I looked in the forum and in the documentation, and was not able to see such a feature
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