So an interesting discovery. Talking from the OP of this post:
His device is doing 12+41+41. This is confirmed in the field test mode screenshots and speed test results. Data is working. VoLTE is working. Status bar indicates "Sprint LTE".
Speed test results and primary carrier
CA status screen
@RAvirani, any thoughts?
Edit: I figured it out. Field test mode hasn't updated in over an hour. Never mind.