p.1 #1Julieanne Kost : Lightroom Classic Trick: Multiple Masks in One Click
Another pretty useful YT video by Julieanne Kost
"In this video, Julieanne demonstrates how to install and use two time-saving presets—one for landscapes and one for people—that instantly generate detailed masks so you can jump straight to editing. These two presets don’t make any adjustments to your images—they’re designed to save you time by automatically creating multiple masks with a single click"
Towards the end (~3/4) she described how she compiled the landscape preset with 8 mask from 2 images with 4 masks each, so if you follow that you can roll your own preset.