It is.
>> Could we get new spectrum support via Firmware update?
Yes. In US/FCC, the procedure is called "Class II permissive change".
Also, US, Korea, EU/UK, Chile, Brazil have opened up 6 GHz band. More countries will follow in coming years.
AFAIK, EU/UK, Korea only has plans to discuss and move forward on selected spectrum sometime in mid 2021. No exact date has been announced unlike the US. Which is a done deal. i.e It is not likely any part of the world other than US to get 6Ghz in 2021.
> Class II Permissive Change
Is that new? I remember Smartphone cant add new frequency spectrum support without going through FCC recertification again . Although that was many years ago.
UK/EU is in final stages of regulation. Final approval for EU countries is in March 2021; and after April, countries will implement it in their rules.
Brazil has approved their rules today! Chile and some other countries have rules in place as well.
[1] https://www.fiercewireless.com/wireless/samsung-galaxy-s21-u...