iPhone receiving android text messages, but not sending

We are receiving iMessages without any issues and we are receiving text messages from android users marked in green but when we try to send a text message to an android user they do not receive it. We are on an iPhone 14 Pro using iOS 17.5.1. We have spent hours on the phone with both Apple and T-Mobile and they have provided no solutions but it is affecting our business as we use text messages all the time for this work phone.

I saw a similar issue without any solutions dated back to January 2024, so I’m hoping someone can help us.

We have tried the usual hard reset, update carrier settings, turn on and off the phone, turn on and off iMessages, turn on and off SMS and MMS

please help