Extender connected

I went to spectrum,  my account, my equipment  found devices  on network, it showed me 6 or 8 units but the most recent was a 7 or 8 digit thing so no way to tell if even related  to mesh extender nothing matched numbers  could be one of 2 tablets on network,  Is there any 3rd party apps that could show what is all on this network, never knew it was going to be such  a hassle,  thanks for your time I just keep trying to an answer somewhere, worst case I just do factory reset, but I can't  yet need wifi outside for genatorer  app to be set up this week, hope it works with extender all lights all steady green, sign in to network with network name and network password which I know is working , thanks all