Is anyone here familiar with how to set up the apollo on wifi? I tried to connect the miner to the back of my router just so I could access the dashboard but when I put the password in for the wifi, it wouldn't work.
Assuming that you used a Ethernet cable for that: In that case you are not connecting to the WiFi and that password might be wrong.
To connect to Wifi you need to have a display going. You could use a computer monitor or a TV and connect the Apollo with a HDMI cable.
No, you could use the Ethernet connection and a different device on the network to set up WiFi, then disconnect the Ethernet cable and it should switch over to WiFi.
However, I don't think WiFi is generally very good on the Apollo. There have been reports of people having issues with it. One idea I had was to 'route' the Orange Pi 4's antenna outside of the metal casing, which may act like an RF shield and weaken reception.