I have been testing the Beitian BN-220 GNSS module, by hooking it up to U-BLOX/U-center and can get fixes on the GPS network and the GLONASS network (both exclusively or combined), but despite the fact I live in Europe it will never see a single Galileo sattelite.
According to the "datasheet"
it should be able to receive the following:
GPS,GLONASS,Galileo,BeiDou,QZSS and SBAS
Given the quality of the datasheet I wonder if anyone has it working in combination with the Galileo network.
I am by no means an expert on this. I don't even have my BN-220 yet. But I was researching the same thing, and it looks like a known problem with a known fix. Hopefully this will help...