A cloud-based identity and access management service for securing user authentication and resource access
Hello,
As this is a tenant lockout scenario and there are no other Global Administrators available, i don't think the members here in Microsoft Q&A community can help you restore access or escalate directly to the Data Protection Team.
You'll need to contact Microsoft Support and request an account recovery process for tenant ownership verification.
If your organization works with a Microsoft Partner and has an active GDAP relationship, I also recommend contacting your partner, as they may be able to reset your access or assist with opening a support request and guiding the recovery process.
Thanks.