A- For universities in Europe, there is no one-stop-shop to find IB requirements per subject.
Students need to visit the Course page of the institution of their choice and check the requirement if there is any.
B- EPFL in Switzerland requires Math (HL) and Physics (HL) for any engineering.
C- The Netherlands in general: (the three most selective majors)
Economics, econometrics and (international) business studies:
Mathematics SL
Universities of applied sciences:
Mathematics HL
Physics HL (chemistry at HL instead of physics for certain fields)
Chemistry SL (or physics at SL when chemistry is offered at HL)
Medical and related fields:
Biology HL
Chemistry SL
Physics at SL
Mathematics SL
Admission may vary by institution, so students need to carry their own research.
To find programs and institutions students can use the search engines separated by destination available on Unifrog.