I have a couple of curtains that use RF remotes and do this through a Broadlink RM4 as it can control IR and a lot of RF devices. Do be aware that just because they use RF that a device like a broadlink may not support the protocol that runs over it. I've run into that before, so there's a possibility it might not work. There are a couple of Broadlink to Hubitat options available on these forums.
A fun project was a window opener I have uses encoded IR, which is a pain as the Broadlink cannot help. With that I've opened up the remote and use a Raspberry Pi Zero with a dry relay hat that shorts the switches in the remote. Shows anything is possible.
I think the frequency maybe incorrect, RF is typically 345 or 415 IIRC?
If so the broadlink rm pro can work.
EDIT-I was WRONG. Holy cow, I've never seen a home RF device use that frequency,so it's some kind of Wifi, likely a proprietary band maybe? There are some radio engineers on here, so I'll stop blabbering
Nope. I took the electrostatics (6.03) and electrodynamics (6.04) undergrad courses over 50 years ago at M.I.T., and the Receivers, Antennas, and Signals course (6.661 ?) when I got my Masters degree, but no RF experience. Designed computers, analog & digital instrumentation, Unix device drivers & OS internals, and a 4.2BSD port, until I changed careers 30 years ago, but no RF design. Sorry.
@jeffjangell did you find a solution for your higher frequency RF remote? I am going down the same rabbit hole currently. Considering just wiring in the Zooz relay to either the remote or receiving box. Leaning towards remote (or perhaps just buying another one in case the soldering goes south...). Would love any insight or pitfalls to avoid that you could share. muchos gracias