Assuming the transcript is genuine and reasonably complete, then I would be surprised if captain would have been aware of their escort (if it existed), at least

Assuming the transcript is genuine and reasonably complete, then I would be surprised if captain would have been aware of their escort (if it existed), at least before making the decision to divert to Minsk. Feels like it is something that would have come up in the communication. Also, sky is pretty big, and a MiG-29 has no problem tracking and following a fat passenger jet at a distance. Most likely only way pilot could have noticed the MiG would have been if the MiG would have intentionally made itself seen, i.e. flying very close by.