As far as I know, the only current devices that work with the air service in the app are the Samsung branded ones.
Awair used to have an official integration for their sensors, but they decided not to create an edge Driver version. There are some community members who have come up with a custom integration for the Awair sensors, but they’ve specifically said those don’t work with the air service. Just as regular devices.
Also, historically, there have been some people who took a regular dumb ERV and wired it to a couple of relays to act as switch controls for it. It was a little clunky, but it did work if you’re interested in anything like that. That would give you a lot more Device candidates. This is really the same idea as hooking it up to a thermostat as an add-on device, so you can usually get good wiring diagrams.
Here’s one project report as an example. Obviously, all of the stuff about Groovy is out of date, but the basic concept and the wiring examples still hold.
So you’re really looking at some very different questions.
One) what devices work with the “air“ service in the smartthings app, and as far as I know, at this point, that’s only the Samsung branded devices
Two) what air quality sensors are available that work with smartthings? There are actually quite a few of these that already have edge drivers/new architecture integrations. As I mentioned, there’s a community built one for. Awair. And there are some other standalone devices that people have built integrations for, including a couple from Tuya.
Three) is anyone using ERVs with smartthings, and I think the answer is definitely yes, but they are mostly either wiring controls to dumb ERV’s so it looks like a set of switches, or are using smart thermostats so it typically looks like a fan.
There used to be an SmartThings integration for ecobee that could handle this, but that author has gone on to a different platform, and didn’t create edge Driver equivalents.
Hopefully other people who are doing this will chime in with useful details, I’m just noting that it’s definitely being done by some people.
As another example, Lennox has a wellregarded dumb ERV that can work with the iComfort thermostat which in turn has a lot of integrations, including Ifttt.
Four) are there any standalone smart ERVs that don’t work as part of an air conditioner setup that would work with smartthings? I don’t myself know of any, but maybe someone else does.
Five) any other options? Well, Hvac is one of the Matter device classes, so it’s entirely possible that within about a year there will be either a thermostat or a smart ERV which works with matter and can be brought into smartthings that way. But we aren’t there yet. 
Are there any of those approaches that you want to definitely rule out?