Azure Back Up Failure Due To Subscription Level Delete Lock

Dear Team,

Problem: We've set up Azure back up of VM using Recovery Service Vault service and 30days retention policy is applied.

But We've applied 'Delete Lock' on Subscription level

So when it reaches maximum restore points and it fails with below error

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Now I wanted to develop a powershell script through which I can get whether restore point collection has been reached to maximum or not? Is there any method through which I can extract that information?

If I get that information, I will disable the lock and Azure do it's job, once back up successful, I will re-enable it. But for that I need to know restore point collection has been reached to maximum or not. How can I get that details.

Any help is appreciated.