Hi,
Good afternoon and thank you for your question.
I reproduce it on Graph Explorer by using: https://graph.microsoft.com/v1.0/sites/mydomain.sharepoint.com:/sites/SPOSite
Then I used the ID: https://graph.microsoft.com/v1.0/sites/mydomain.sharepoint.com,abcd1234-ef56-78gh-abcd1234,wxyz0987-65wx-43yz-wxyz0987/drives
I make sure that the correct permission is also assigned to me as per article:
https://learn.microsoft.com/en-us/graph/api/drive-get?view=graph-rest-1.0&tabs=http
Please let me know if I answered your question. If it is, please upvote and accept this as an answer. May you have a great day ahead!