Hi @Daniel ,
Unfortunately, according to my research, there is currently no such way to use PowerShell to batch modify Pages.
PowerShell does not have a corresponding command to achieve this.
The current method is to recommend that you modify it manually. Or you can go to the Partner Center, where customized services are provided. I hope you can get the result you want here.
Regarding this issue, I also think that your needs are creative, which allows us to discover the user's needs for this function. So we suggest that you can submit Feedback on this issue. Microsoft values its customer feedback and a lot of features have been developed and suggested by customers via feedback.
Good day! :-)
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