Just moved in to a house with a Wyze doorbell... how do I set it up?

That’s good. That tells you that the Video Doorbell’s connection to the Chime is intact. That uses a separate radio connection (in the 900 MHz frequency range, so that doesn’t involve Wi-Fi or Bluetooth).

According to the Quick Start Guide, you should see a solid blue light when the doorbell is connected to your network.

I’m not sure precisely what you mean by that (something you did on your phone, something you did on your router, something else?). What I would try is this:

  1. Turn off any 5 GHz and 6 GHz radios on your network. Log into your Wi-Fi router’s Web interface (or use its app) and make sure that only the 2.4 GHz SSID/radio is operating/available. This is temporary, and you can turn the other radios on later. (I understand that some eero devices have an app feature that essentially “pauses” non-2.4-GHz Wi-Fi to make this easier, so that might be an option if you use that.)
  2. Turn off mobile data for the phone you’re using with the Wyze app. You want to make sure that your phone’s only Internet connection is through your 2.4 GHz Wi-Fi during device setup.
  3. Reset the doorbell with the button on its back as before.
  4. In the Wyze app, tap the Home screen upper-right  ➜ Device ➜ Cameras ➜ Video Doorbells ➜ Wyze Doorbell and then walk through the in-app setup. You can skip the installation tutorial, and the app should prompt you to input your Wi-Fi credentials if they’re not already stored. At some point, it should generate a QR code for you and instruct you to show that code to your doorbell’s camera so that your Wyze Doorbell can receive the Wi-Fi information it needs to connect to your home LAN.
  5. If that all works as expected, then you should be able to name the device and have it appear for you in the app. At that point, you can re-enable mobile data on your phone and any 5 GHz or 6 GHz Wi-Fi SSIDs you were using before.

If that doesn’t help, then I’d take a look at Wyze Video Doorbell Setup Troubleshooting.