In addition to the other (great) reply pointing out the difference between 5G and 5Ghz, there is also the nuance of channels within the 5Ghz band. While the band may be lawfully used within a region, some channels within that band may be banned.

So it’s not enough to say “we have 5Ghz wifi here so it’s fine” because there are many channels within that band which may not all be treated equally.