Escort where?
As said they are launching well within Russian air space, and are sited well back from the front lines.
They got moved from most accounts.
They tend to be known to be in the air but never get close to Ukraine.
There will be numerous bases equipped with fighters much closer to Ukraine than these ever get so why would they need escorts.
They aren't bombing, they are aerial missile platforms.
300-500 miles isn’t much distance. If that is in fact where they are launching from.