FYI, iPhone will work in dual sim mode with only 4G. Apple says you need to turn off one sim in order to have 5G function. If you are running dual SIM mode, it will only function with 4G capability on both lines.
Here is what I was told on Samsung technical chat initially, tehn when "elevated" to pro support. Looks like esim firmware support is not available (see below):
@rsvatsavai, why go through all the trouble? Wait until the masses run out and buy it and then ask them if the dual standby functionality is available. It's much better than having $1000+ dollars tied up in a company that refuses to put the actual specs of the US version on the US website. Mark my words when I say the bait and switch is coming.