my router AC 1750 is not listed.  Trying re-connect wifi after switching to another internet provider:  We Link.

The internet connection is functioning ok on my other devices.  I am trying to get my AC 1750 connected via wifi to my LAN.  

I have connected my internet(eero)  modem by wire to the AC 1750 and it operating normally.  

My dilenma is how to get it wirelessly again which I done with my previous internet modem? 

TIA for any help at all..