In the United States they have to, by law, give you your prescription if you ask for it. Pupillary distance is not part of the prescription though but you can easily measure it yourself in a mirror with a ruler that has MM (or use a service like ZenniOptical that has a printable ruler that you use a credit/debit card to make sure it is printed to the correct scale).

https://www.ftc.gov/tips-advice/business-center/guidance/com...

Correct, because PD isn't part of the prescription and isn't measured by an optometrist or opthalmologist during an eye exam.

The PD is measured by the optician later as part of the glasses fitting process.