Do you want to restrict changes to tables in Word documents? If so, I would like to suggest you try Restrict Editing feature.
- Select the contents exclude tables.
- Go to Developer tab > Protect group > Restrict Editing > Tick the box of 'Allow only this type of editing in the document: No changes [Read only]' > Tick the box of Everyone, which means everyone can edit the content excludes tables. To show the Developer tab, please see: https://support.microsoft.com/en-us/office/show-the-developer-tab-in-word-e356706f-1891-4bb8-8d72-f57a51146792#:~:text=How%20to%20Get%20to%20the%20Developer%20Tab%20in,3%20Check%20Developer%20and%20select%20Save.%20See%20More.
- Click 'Yes, Start Enforcing Protection'.
For more, please refer to 'Allow changes to parts of a protected document'.
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