Hello
No need at all for FLIR to be "On" if you want to use the TFR.
Where have you read that??
No TFR available in training: the dual Viper doesn't have it. Don't ask me why.
I confirm that Block 5x and MLU do have the TFR
But I don't remember about the Block 4x and the CCIP variants. Never used the TFR much.