Pc won’t find signal

We just moved and the pc’s had no problem finding the network on my Asus router 3 days ago. I haven’t set up the asus router because Xfinity seems to want us to use their extenders instead and doesn’t make it easy to install our own. It seems to be an Xfinity issue. They have told me PC’s only can be hardwired to their equipment- but that seems wrong. 

the network adapter is rz616 wiFi 6e 160mhz

the Xfinity modem is xb8

i have separated the triband on the modem and am broadcasting at 2.4 and 5 instead. I’ve updated the network adapters. Restarted all devices- I see two other networks when I click on WiFi on the PC. (When I click on WiFi from my iPhone I see 4 different networks.)

it’s the same issue on both pc’s - no problem with any apple products.

Hi there user_b8fmn1! Sorry to hear you've been having issues connecting both of your PCs to your home network. You've come to the right place for help! It looks like you've already tried several steps we would typically recommend to help you get connected. We might need to take a closer look at the issue. Please send us a direct message with your full name, name on the account (if different), and service address, and we'll get started.

• To send a direct message, please click on the chat icon in the top-right corner • of the screen, and select "Xfinity Support" to initiate a live chat. 

• Click "Sign In" if necessary

• Click the "direct messaging" icon or https://comca.st/3J0ir1l

• Click the "New message" (pencil and paper) icon

• Type "Xfinity Support" in the "To:" line and select "Xfinity Support" from the drop-down list which appears. The "Xfinity Support" graphic replaces the "To:" line

• Type your message in the text area near the bottom of the window

Press Enter to send it