WiFi 6 icon is on my Samsung S21 BUT Orbi RBRE960 Attached Devices shows Connection Type as 5G

You're confusing wi-fi 6 (which is still 5Ghz) and wi-fi 6e (which uses 6Ghz and the separate radio in your RBRE960).  From https://www.tomsguide.com/face-off/wi-fi-6-vs-wi-fi-6e-whats-the-difference:

1.  Wi-Fi 6 can send and receive data over both the 2.4- and 5-gigahertz (GHz) bands (Wi-Fi 5 is 5-GHz only) and can move even more data by running a single ultra-wide 160-megahertz (MHz) channel on its 5-GHz band.

2. Wi-Fi 6e added more than a gigahertz of fresh electromagnetic spectrum space in the U.S., ranging from 5.925 GHz to 7.125 GHz... This additional block of spectrum, generally referred as the 6-GHz band

The Android screenshot just indicates Wi-Fi 6, not 6e.  From https://www.androidauthority.com/wi-fi-6-910014/ : If you see a number 6 alongside the Wi-Fi symbol, it means that your device is connected to a Wi-Fi 6-capable router.