Out of idle curiosity, I did a search for "EASA IR requirements".
After my head had stopped spinning from reading Sir Humphrey's gobbledygook, I see that the requirement is (simplifying ) "50 hours cross-country in aeroplanes". Nothing about the aeroplane being IR certified. So my question is "is an ultra-light an aeroplane?"
As a practical matter, I imagine most PPLs acquire their cross-country hours in non-IFR certified aeroplanes.
I am SO glad I don't fly in EASA land anymore, even after overlooking the staggering cost