Is it not possible to send email using powershell module?

Hello, I'm learning Communication Service and I'm very confused so far on how to use it. My initial plan is simple - get connection string using Powershell to variable and use that variable in send command. I can't find in documentation neither the command to retrieve connection string nor possibility to send an email. I've found an az cli command to send an email, but no way to get conn string. How am I supposed to do that without storing connection string as env variable or in plain text in script or using key vault? Plus, where's the Powershell command to send an email? Is it only possible with az cli, like what's up with that??