Not according to Wikipedia (
https://de.wikipedia.org/wiki...) and a brief Google search, but I cannot confirm this with my own facts.
If necessary, you should ask Sunrise directly whether they use 2.1 GHz antennas (5G NR: N1) with 5G or not.
As you can see in my question (and my own answer), this is not "real 5G" with selective antennas but only reprogrammed 3G/4G antennas with slightly increased efficiency and therefore more power. The "real 5G" with selective antennas and 3.5GHz (NR: N87) does not work with this phone according to the manufacturer's website.