By default, the Huawei smartphone selects 2.4 GHz as its hotspot frequency band, which is also supported by all WLAN devices, but to provide faster data
transfer, the 5.0 GHz band can be activated, which is supported by most newer devices.

Android 10 | EMUI 10.0
Step 1:  Open the  Settings
Step 2:  Tap on  Mobile network
Step 3:  Tap on  Tethering & portable hotspot
Step 4:  Tap on  Personal hotspot
Step 5:  Tap on  Configure hotspot
Step 6:  Enable  Show advanced options
Step 7:  Tap on  AP band
Step 8:  Choose  2,4 GHz  or  5GHz
Step 9:  Confirm with  OK
  1. Open the Settings
  2. Tap on Mobile network
  3. Tap on Tethering & portable hotspot
  4. Tap on Personal hotspot
  5. Tap on Configure hotspot
  6. Enable Show advanced options
  7. Tap on AP band
  8. Choose 2,4 GHz or 5GHz
  9. Confirm with OK

Huawei Instructions