Open Lightroom right now. Go to the Presets panel. Import one new XMP pack, or create your own. Spend ten minutes applying that preset to ten different photos—bright ones, dark ones, portraits, and landscapes. See how it reacts. Adjust the exposure slider.
To understand the modern Lightroom ecosystem, you must first understand the file extension: . lightroom presets xmp
Always choose XMP presets unless you’re stuck on a legacy version of Lightroom from before 2018. Open Lightroom right now
You cannot manually drag files into mobile Lightroom. Instead: accessing the Presets menu
Opening a photo, accessing the Presets menu, and using the "Import Presets" function to select the source files. Pretty Presets for Lightroom to the modern XMP format? What Are XMP Lightroom Presets? (Lightroom Mobile Update)