Hi,
Galileo is not visible in the US: https://galileognss.eu/why-galileo-is-not-seen-in-united-states/
Activation of Galileo with parameter GPS_GNSS_MODE still does not work with current copter 3.6 and equivalent plane/rover releases.
See also: Can't set GPS_GNSS_MODE for Galileo on Ublox SAM-M8Q
I yust got some new M8N and SAM-M8Q. They all had Galileo deactivated by default. Galileo can be activated with U-Center. But SAM-M8Q forget the configuration after some days, when GPS buffer battery gets weak.