Using iOS / Safari mobile and the Brave Browser? 

Procedure
Open the Shortcuts app
Tap the + on the upper right-hand corner
Type "Open URLs" in the search box at the bottom
Choose the Open URLs option at the top of the list
In the box labeled Open type Brave://open-url?url=
After that, enter the URL you want to open.

So it should look like this if you’re opening Gab
Brave://open-url?url=https://gab.com/

Tap the arrow at the bottom of the screen
Scroll down and tap 'Add to Home Screen'
Name the Shortcut and click Add on the next screen
Tap Done on the next screen at the top right
Your Shortcut will be added to your screen 

Tap it and make sure it opens the correct URL