They are normal morphs, not pose morphs, you can use ceq3 morphmerger to separate them out if you want and you can save custom settings for different purposes. (Or other morph exporters/mergers) If you export it, the morphs will be saved, since they are SHAPE MORPHS and not POSE MORPHS
The plugin? It's spread detection and posing of common and custom morphs in one plugin. Add it to the character, set your min (closed legs) and max (open legs) values and the morphs will respond accordingly, moving the different morphs open and close. There are a different sections, 3 which are affected by spread (Center, Major, and Minor Morphs) Then there are 3 which are static for now (Bender morphs, which rotate, extend, expand, extrude, the entire vagina, and labia, and anus) Minora Asymmetrical morphs, for customization of different sections of the minora, since not all are symmetrical and static morphs, which just do a few static morphs that aren't affected by the leg position as well. It's really meant to give you a one stop shop to customize the vagina for a certain scene or pose, so you can make it look real, instead of Genesis 2 default blah. Patreon version is currently going through another minor update, with extra morphs, and adding the ability to turn on or off each section. You can save presets for later use as well as a JSON file. It's intention is to be able to bring life to the vagina region, since it lacks seriously in the vanilla state. That's the what it does. All of my morphs in the HUB version are available on the HUB, patreon version will have extra morph paks for download.