It should come with a multitude of adapter plates to use whatever your optic of choice is.
I would suggest the RMR I have tried quite a few of the available offerings Insight MRDS, Leupold Delta Point, Docter, RMR and Aimpoint micros. The RMR and Aimpoint Micros are far more durable the MRDS and Docter had issues relatively quickly about 2000 rounds before there were issues with flickering or just dying. The delta point lasted longer but its a bit larger profile wise and its actually structure isn't as durable as the RMR and T1. The RMR and T1 lasted the longest before developing issues I've had multiple RMRs make to 8k rounds without issue but that seems to be around where they give out. The T1 made it to around 10k before the rheostat had been beaten to death by ejecting brass to the point it would freely rotate under recoil causing it to turn off go to dim or too bright. The optic will eventually have some issues the violence of the slide movement will eventually cause issues but Trijicon, Leupold and Aimpoint all stood behind their products and replaced and repaired the optics for me.
You are either going to have to get an optic compatible holster or modify one with a heat gun and some dremmeling to make them work. Lots of the bigger holster makers in the US make optic compatible versions of their holsters like RCS, OTG, Bravo and others.