Installing driver for Thunderbolt or PCIe device in macOS 15.x (Sequoia), and the "allow" button does not appear at the end of the process

There is a problem with driver authorizations with macOS 15.x.  This workaround has been successful to get around this:

With no other applications running…

• 

  Launch Lynx Driver Installer by itself from Applications.

• Click on the "Remove Driver" button, type in your password when prompted.
• Restart the computer.
• After the computer has restarted, launch the Lynx Driver Installer from your Downloads folder and follow the prompts.
• Click on "Open System Settings" when prompted (NOT THE OK BUTTON!)  
• When the Driver Extensions dialog pops up, "Allow" the blocked Lynx Driver Installer, type your password when prompted, then click "Done".
• You'll see "Succeeded" in the Lynx Driver Installer.
• Go to Audio MIDI Setup where you should see the audio device.