As per GDPR, a company that collects sensitive personal data is required to respond to a request as to what personal data is being stored, for how long, and why.
I know that VRChat claims to request deletion of said data (i.e. pictures of personal ID and personal pictures of individuals) but there is no information forthcoming how to obtain official confirmation that these requests are actually being complied with.
Again, as per GDPR compliance, such confirmation (or any information as to what data remains in storage) would have to be provided by whomever is storing said data (be it VRChat or Persona).
This is not a formal personal request, but a question regarding whom to contact with regards to the personal data being stored after completing the age verification process.
Whom would I have to communicate with if I want to obtain confirmation about the deletion of my personal data which I provided for the verification process? Whom can I contact to request information about the personal data being stored about me?