Show-UDToast replace message?

Is it possible to replace the text in a UDToast dialog? I am running a script in the background, and it would be handy to pass updated status along into the toast message. I’d prefer to not have toasts popping up on top of each other.

I’ve messed with the following:

Show-UDToast -Id tProgress -ReplaceToast -Duration 5000 -Position center -Message  "Adding $txtUserName to $Group"