Thanks for posting ― let's see what's going on.
The Google Wifi router and point uses the same name for both the 2.4 GHz and 5 GHz band networks. This means that the Wi-Fi network uses both radio bands. But keep in mind: while both bands can be used, the personal devices (a smartphone, tablet, laptop, etc.) will connect to only one radio band at any given time. Nest Wifi, Google Wifi, or Nest Wifi Pro attempts to select the band that will deliver the best performance for your device. Currently there is no option to manually disable either of the bands or to connect to them separately.
Give these steps a try:
Create a hotspot with a mobile phone. However, 2 mobile phones are required.
Use the first device to create a hotspot (mobile phone).
How to set up a mobile hotspot:
Let us know how it goes.