An API that connects multiple Microsoft services, enabling data access and automation across platforms
Hello Jareth Lomson,
Thank you for reaching out to Microsoft Support!
After our test, when the folder name is v1.0, it runs well, and the test results are as follows:
Please try again, or use the id of the item to get the children, as follows:
Reference document:
https://learn.microsoft.com/en-us/graph/api/driveitem-list-children?view=graph-rest-1.0&tabs=http
Hope this helps.
If the answer is helpful, please click Accept Answer and kindly upvote it. If you have any further questions about this answer, please click Comment.