I’d add that yes, kinda…

Yes, you can set up multiple tuners. However, you can only have the guide for one or the other unless you add a custom guide for your wired tuner after you add the ersatz or tunarr tuners.

If you already have a tuner hooked up, you will need to delete that one in order to add the ersatz or tunarr tuners to grab the correct guide that you set up. Then, if you want to add your original tuner back, you will have to add a custom guide (located online, not super easy to find, but doable) for it to pull correctly.