Hi, Martyn Thompson-MEnt
Thank you for using Microsoft products and posting them to the community.
understand you're having trouble with "Loop." I understand the problem and would like to help you better in your situation.
In Loop, if you want to display elements of a child page on a parent page, you may need to manually create such a list, as Loop may not currently have built-in macros or automation to pull and display data directly from child pages.
Since Loop is a relatively new platform, its functionality may not be as mature and diverse. Therefore, if you need more advanced automation features, you may need to use Loop's API or integrate with other tools to do so. However, this is beyond the scope of Microsoft Forum support.
We recommend that you visit Microsoft Learn and submit your question by clicking Ask a Question. There are many experts in the field who will be able to provide you with expert guidance and assistance:
Microsoft supported products on Q&A | Microsoft Learn
I hope the above information can help you. Feel free to submit a post if you need further assistance.
Best regards
Aiden - MSFT |Microsoft Community Support Specialist