Earlier quoted context omitted.
Looking at the required paperwork, I agree with Pocketbase to refuse funding.
Why? I don't see it as particularly onerous. They are simply complying with their country's KYC requirements. I've gone through worse to accept payments from US citizens with a US corporation. KYC/AML is annoying but its pretty unavoidable unless you want to do crypto.
You can look at the us W8-BEN