It's not normal that jetways take so long to appear.
Maybe there's a problem with the Simconnect communication, such another addon sending so many commands (weather engines sometimes cause this), because GSX will send a list of the jetways to SODE when you enter the airport using Simconnect, andthis shouldn't normally more than a second, but might have been slowed down (never seen something like this), because the communication channel was overloaded by other addons, so GSX and SODE didn't had enough priority to connect.
That's the only possible explanation I have, following your report of jetways eventually appearing after a while, which indicates everything is installed and is running.