It's not just common in the US, it is the de facto standard across almost all mortgage types and sizes. Even weird, non-conforming properties with "jumbo" sized loans can get fixed at 30 years.
Also, I will point out that in both Switzerland and the Nordic Countries, 40 and 50 year mortgages are now in very common use:
"Repayment periods in Switzerland can be incredibly long, with deals lasting between 50 and 100 years being relatively common."[1]
"Swedish regulators calculated in 2013 that the average mortgage term was around 140 years."[2]
In fact, now that I think about it, I am surprised that the US culture of "financial innovation" has not produced more standardized long-duration mortgages ... I do not know anyone, for instance, with a 40-year term ...
[1] https://www.expatica.com/ch/housing/buying/your-guide-to-swi...
[2] https://www.thelocal.se/20160324/sweden-limits-mortgage-loan...