GNU/Linux MX Installing MacBook Pro 15 2019 Wireless Driver Guide
Hi! The linked Tutorial shows you Step-by-Step How to Install MacBook Pro 15 2019 Wireless Wifi/Bluetooth Drivers in MX GNU/Linux Desktop.
With Model Identifier: MacBookPro15,1/MacBookPro15,3 (To Check see: How to Identify your Mac)
First, the needed Broadcom Wireless Drivers are currently bundled in the New 6.2+ Kernels.
In any case this Guide include also detailed instructions about How to Install T2 Kernel on MX Linux.
But then what is easily missing is just the Non Redistributable Proprietary Firmware.
GNU/Linux MX MacBook Pro 15 2019 Wi-fi/Bluetooth Driver Installation Guide
First, you may be interested in How to Upgrade Kernel Guide.
And then follow: How to Install Apple T2 Wireless Firware.
Last, in case of Issue you may see also: Linux T2 Kernel Installation Guide.