I usually don't use my phone to internet, but while I was shortly away from my computer, I use my phone to login to the Zorin Forum and got the notification if I wanna install the app. I did and got this;
Actually it is not an app. It is bookmarked link from browser that looks like app and it is feature of Discourse which is already mentioned by @Aravisian .
So actually when you click the icon the browser is used to run the forum.
google apps are not all safety. Many times you reading some app stealing your private information.
More security is apple apps but they are near 25 - 30 thousand;
Windows have 230 - 250 or more thousand.
So i checked the fonts in Zorin connect are black that why you see all black screen. On white background propably you will see some settings. On kde the background is black but fonts are white.
Diffrents mobiles have diffrents settings.
NO, bourne my phone has no problems connecting with Zorin using USB. With USB connection everything is okay and my phone is up to date I receive update almost every month.
KDE connect also only uses WIFI connection. Connecting through mobile hotspot with my pc is not possible.
The Zorin Forum app is a shortcut and disables use of the url bar (keeping you in that window for forum). It's quite safe, i is it regularly... like now, to follow the forum and post answers.
Try turning on Bluetooth on your laptop and pairing the two, then accessing zorin connect. If your devices aren't paired it will is wifi. You could connect your phone to your laptop by cable, that will use your phone as tether or you can share your phone wifi... both of these are slower though.
There is a language barrier with bourne... the kids means well, but misses the mark more than hits it.