If you are using WPA or WPA2 encryption with a reasonably strong passphrase and haven't told it to a bunch of people you shouldn't have to worry about anybody connecting to your network.
Interestingly, when I just now brought up Network in File Explorer I had a "full biscuit," which disappeared after I checked Properties (something about Amazon).
I was also surprised to see that my iPhone, which definitely is connected, doesn't show up.
Just guessing, but I'm wondering if those random phones are ones trying to connect. If, for example, there are people walking by their phones will detect the Wi-Fi, try to connect, discover that it is not an open (non-secured) network, and abandon the attempt.
Interestingly, when I just now brought up Network in File Explorer I had a "full biscuit," which disappeared after I checked Properties (something about Amazon).
I was also surprised to see that my iPhone, which definitely is connected, doesn't show up.
Just guessing, but I'm wondering if those random phones are ones trying to connect. If, for example, there are people walking by their phones will detect the Wi-Fi, try to connect, discover that it is not an open (non-secured) network, and abandon the attempt.