How can I use 5G in the list of Google said unsupport country without root ?

[ABESCN]

I'm the pixel 6 pro user from China.
After i use Pixel IMS my phone can turn on volte in china(CMCC Network Company)
But I still want to use 5G in China , and I look for many BBS need to root to use 5G
I don't want to root my divice , so is there any way to enable 5G without root?
thank u so much!