Hi @Bai, Andy ，
Aside from the configurations you mentioned above, it's also suggested to go through the document below and make sure all the other criteria are met:
Dial pad configuration
Please note that after the configurations are made, you may need to wait for up to 24 hours and restart the Teams client to see the dial pad. In case the dial pad still doesn't show up, please run the command below and see if there's any error in the output:
Get-CsOnlineUser -Identity $user|Select McoValidationError
You can also run the diagnostic tool in the Microsoft 365 admin center via https://aka.ms/TeamsDialPadMissingDiag which may help verify possible issues that affect the dial pad.
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