I have a Moto G6 phone and just recently are having issues with the green dot notifications for phone calls, emails and text messaging. I've always had a green dot alerting me that I had a notification. I have sound alerting me but if I am not near my phone and don't hear it, I won't know if there is an alert. Is this a T-Mobile issue, and is anyone else having that problem?
How would it be a T-Mobile issue unless you are not receiving calls, texts, and your data isn't working? Have you installed an OS update recently? Have you checked the options to see if the notification LED somehow got disabled? Are you able to test and see if the LED is still working?