It's supported by polish banks for PLN accounts, but I don't think there's a requirement to be a citizen to open an account. I know Revolut also allows using it, if you create a PLN account in it.
BLIK has one ugly caveat, though: it has no chargeback procedure.
[1] Year 2024.
[2] https://www.blik.com/en/about-us#id-15ce9a61-2597-11f0-8657-...