The point you enter hyperspace from realspace is a tunnel into hyperspace from realspace. Hyperspace is mapped to realspace, it's just more compact. If you enter hyperspace at a point in real space - anyone entering hyperspace there will be next to you in hyperspace. So no tracking is needed. Since it was a skip jump - so you enter and exit practically a second later - ending up in a different real space point - far away from the entry point. Tie Fighters could just do the same, just skip jump when Falcon skip jumps. They could easily track the Falcon systems and its hyperdrive firing up.
I have no issues with how they followed Falcon.
What I have issues with is the distance they travelled over such a short amount of time - and that the worm creature survived a hyperspace jump thru its mouth - that's inconsistent with the Holdo Manoeuvre.