Hello, SkeetBecker
My name Is Alonso, I am an independent advisor.
In the event that you want to see this from your Windows 10 The first step you have to do is go to Start and access Settings. There later you will have to enter the Network and Internet option and click on Sharing options, which you will see in the central part of this window, within the section Change network settings.
When you are inside we will see a series of options where it is indicated if you have activated or not the detection of networks in private, guest or public mode, as well as for all networks. In case of being within a network such as the home itself, we have to go public. There you must check the option to Activate network detection. Same thing in File and Printer Sharing.
By accepting this we can see computers connected to the network and they could also see that device.
On the other hand, if you are trying to see the devices connected to the network through a modem, you just have to enter it, you can do this as long as you are the administrator of that router