Read the “NYS time to process thread”, there was a similar scenario in there.
From what I recall the supervising CPA must be licensed in the state they are supervising the employee.
If your supervisor is licensed in MA, then I strongly advise that your place of employment is also in MA, if possible.
Also, always refer directly to NYS source documents when possible.
NYS CPA Form 1 and Form 4B and related instructions are your bible.
All forms and instructions can be found here.
https://www.op.nysed.gov/prof/cpa/cpaforms.htm
From the Form 4B
Who can complete this form?
A certified public accountant licensed in one of the U.S. jurisdictions who is properly licensed and registered
or authorized to practice in the jurisdiction of their principal place of business. If a CPA supervisor was not properly licensed or registered or
authorized to practice in the state where they practiced, the experience cannot be accepted.
If your firm does not have an office in MA, then I would search out another supervisor who is licensed in NYS to sign off on your 4B.
If there is not another supervisor available to sign off for you, then your current supervisor needs to register with NYS, and once they are properly licensed in NYS, then you work for another year and they should be able to sign off for you at that point.
You may be exception to the rule, but I HIGHLY doubt you will be that lucky.