My son in law uses a Spectrum issued Arris modem/router with his own router which resembles a deep space antenna array. How it's connected and how the Spectrum router was disabled is beyond my pay grade. So it can be done with a Spectrum issued or approved cable modem. We have the Spectrum issued gear in a 1500 square ft apartment with everything except the principal TV and a PlayStation operating on WiFi
Not a fan of the monthly equipment charge but if anything takes a dump, a 4 mile drive to Spectrum for an exchange does the job.