Muslim woman may not wear a hijab as judge, in Germany
https://www.welt.de/vermischtes/article692ebe74937203503697a1bf/muslimische-richterin-muss-in-verhandlung-kopftuch-ablegen.html
The more important question is whether a Muslim should be allowed to exercise in any judicial function, given that they can never be considered as "neutral". They accept Sharia law as legitimate, so their perception of law & justice is fundamentally incompatible with western values.