Im not sure what footprint the RT5-P1 has. The only information that I can find is that it uses Glock MOS and S&W C.O.R.E slide plates. I would recommend reaching out to the manufacturer of the RT5-P1 and ask if they can tell you the footprint.
Yes, this Evolution Gun Works Leupold DeltaPoint Pro Sight Mount is compatible with the Ruger MK I - IV and will accept any optic with the DeltaPoint, RMSc, or J-Point footprint.
The Holosun 407K and 507K will both require you to modify this plate by removing the rear lugs completely and shortening the front two. The 507K offers the Holosun multi-reticle system that features a 2 MOA dot with a 32 MOA circle, while the 407K only offers a single 6 MOA dot.
This Evolution Gun Works Leupold DeltaPoint Pro Sight Mount will fit your Ruger P95 and allow you to install either the Holosun 407K or 507K by removing the rear two lugs and shortening the front two on this plate. The 407K is a single 6 MOA dot while the 507K is a 2 MOA dot with a 32 MOA circle.
The Sig Sauer Romeo Zero will fit to this Evolution Gun Works Leupold DeltaPoint Pro Sight Mount and is compatible with your Ruger P89.
This mount will not be compatible with a Glock 44. The mount that is compatible can be found here: https://www.opticsplanet.com/evolution-gun-works-leupold-deltapoint-pro-sight-mount-for-glocks.html