Can't delete, rename or move some SharePoint folders created via Microsoft Graph API.

I'm unable to delete, rename or move Sharepoint folders I've created using the MS Graph API but I can delete, rename (etc.) folders I create in the Team/Site through web browser/desktop app.

I can also delete the sub-folders and files of the folders I've created via Graph API.

When I say I can't delete them. when I click on the 3 dots in the web browser or desktop app, the options to delete, rename or move simply aren't shown.

I can see that I have owner permissions on all of the folders in the Team/Sites, or at least it looks like I do.

Anyone know what's preventing the deletion of these folders and how I can overcome it?

Thank you!