Hi manjunath reddy,
Good day! Welcome to Q&A forum.
The behavior you're experiencing is by design in SharePoint Online (and modern SharePoint in general). When you create pages from templates, they become independent instances and don't maintain a live connection to the original template.
Manual Update Approach
- Open each page in edit mode
- Copy the modified sections from your template
- Paste them into the existing pages
- Adjust any unique content that shouldn't be overwritten
Hope these information helps.
Please do let us know if you have any further queries.
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