I have found on Microsoft tech Community a PowerShell tool that should simplify the daily and non-daily work with Teams Voice.
This tool has three categories, which are divided into the administration of phone numbers for users, the creation of callflows and resource accounts including licence assignment and the administration of existing phone numbers.
The script can be executed without initial configuration.
this is the link to the script : TeamsVoiceTool/Teams Voice Admin Tool at main · MSB365/TeamsVoiceTool · GitHub
Personally as a Microsoft voice engineer , adapting and personalizing this script , will be a time saving .
Feel free to post back ;)