Father of my kids wants them to have polish passports as well as English passports.

This means that my kids will have dual citizenship and I won’t. Does that come with any risks to me ? As in can he take my children away from me ? Or does that mean he can take them places without my consent ? They are polish that’s why he wants them to have one. But I’m hesitant to allow it. Am I being silly ? Also to clarify we live in the UK not the US