Small Update to what I wrote previously (I’m sure you guys @ludwig.hotmess @HORU5 @qub1t will find it useful)
I found out that Vital allows to have custom categories & reads it properly directly from preset file!
Of course they won’t appear on the main list on the left under search because Vital only lists default ones therefore you won’t be able to select custom ones that way, but you still will be able to sort presets on the main list using “Style” tab.
At first I was sure Vital presets save ID of the category in their JSON files, but they actually save the name directly in plain text. Using Notepad you can just edit it to whatever you want:
More like cool info than useful solution but if you really want to have own categories, it is indeed possible
P.S. This is also the answer to your previous question @ludwig.hotmess on how to change category for presets made by others - you can do it using Notepad