Mac Keyboard Shortcut to Bring Up Finder
Launch Automator (in Utilities)
Menu: File -> New Window
Choose: Quick Action*
Worflow receives: no input
In Utilities on left, double click: Run Shell Script
Shell: /bin/zsh
Enter for the shell command: open -a Finder
Save the service with whatever name you want
In System Preferences, click on Keyboard
Click on Shortcuts at the top and then on Services at the left
On the right part of the window, scroll down to General
Find the service that you just saved, make sure it is checked, and set a unique hotkey for it
Quit the System Preferences


Enjoy your new hotkey to bring up the Finder.

* In versions of macOS before macOS Mojave, the option was called Service.