Not sure if this will work in your case, but there’s a tool which could be run locally to convert between formats: https://github.com/google-wallet/pass-converter

Also, you should be able to get a pixel much cheaper if it’s 2-3 models behind. Pixel 6 for example can be had used for under $200, sometimes even around $100. That is in the US however - I’m not aware of what the secondary market would be like where you’re at.

Could they not provide a physical pass?

Is that some kind of labubu?