Hi Gary,
Thanks for trusting us and posting in this community, I’m glad to offer help.
To export the member list form SharePoint online to Excel, you can follow steps below:
1. Go to site settings > People and Groups (https://tenant.sharepoint.com/sites/sitename/\_layouts/15/people.aspx) > open the group you want to export > copy the current URL: https://tenant.sharepoint.com/sites/sitename/\_layouts/15/people.aspx?MembershipGroupId=**X**, note the ID number at the end of the URL.
2. Open Excel > Data > Get Data > From Other Sources > From OData Feed
3. Paste the URL in the prompt and delete the content after the “sitename” and replace with the following content:
/_api/Web/SiteGroups/GetByID(X)/Users
And replacing “X” with the group ID you just remembered
4. Get the data and you can choose to delete the useless columns (you may be required to sign in with the corresponding account before this)
Hope the above method can help you, please feel free to let me know the result.
Best Regards,
Arck