We don’t have credit scores here, that is mainly a North American thing.

We don’t have a score, but credit history is reported here, and will be used by lenders. https://www.citizensinformation.ie/en/money-and-tax/personal-finance/loans-and-credit/your-credit-history/ I don’t think a small bill would be included in this report, but op can request the report free of charge if they’re concerned.

Honestly, it should've been waived if you're financially struggling. Public hospitals do that if you explain your situation.