Hi @Narinder Paul
Thank you for posting your question in the Microsoft Q&A forum.
Currently, Microsoft has not released any documentation or public announcement confirming that the list activities API is supported in the v1.0 endpoint. If you want to check whether a specific API is available in v1.0, the best approach is to use the version selector and test it directly in Graph Explorer.
At this time, Microsoft has not shared any roadmap or guidance indicating that list activities will be added back to the v1.0 API set. The functionality is available only in the beta endpoint as a preview API. Microsoft also states that preview APIs can change at any time and may stop working without notice. For this reason, applications should not take a production dependency on any API that exists only under /beta.
You can read more at Microsoft Graph REST API v1.0 endpoint reference - Microsoft Graph v1.0 | Microsoft Learn.
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