How to see if anyone else is using my 5G Home Internet service?

Hello - I recently installed 5G Home Internet, and connected it to my tv. 

A few days ago, I saw a message display on the tv screen that my next door neighbor was trying to access the network. That message went away after a few seconds, and there was no following message that they were allowed or blocked. 

Is there a log I can see somewhere that will display accesses to the network, so I can make sure I am the only one using my service?