Hello
Thank you for posting your query in the Microsoft Q&A Community.
License-based subscriptions are not resource-related subscriptions. Rather, they are licenses within your tenant. To view the license, sign in to the Admin portal by accessing admin.microsoft.com with a Global Admin user account.
Once in the portal, click on Billing, then Your Products. You must ensure the licenses have been deleted before you can delete your tenant.
NB: Some licenses might take days to delete after canceling them.
Let me know if further assistance is needed.
Babafemi