How to view devices connected to hotspot on Google Pixel?
Another  "uglier" workaround involves using terminal , but it has an advantage if you already have terminal installed in your device. 

Simply type ip neigh in terminal and you should see an output showing connected devices' ip addresses as well as mac address (but it looks a bit cluttered though)  

See screenshot:



Screenshot (click image for larger variant)

The information in the terminal output includes
:


IP address of connected client
MAC address (obscured in screenshot)
interface (wlan0)
state of connection (i.e STALE, REACHABLE etc)


Note: This does not need root permissions