The specific code for the tool where it does the writing is here (~line 133) and it literally only appends Title, Year and Guid to the .plexmatch file, creating a new one if it doesn’t exist. I’m not 100% sure that the Guid is a unique database-level value (and not from one of the ID services), but since it’s written as Guid instead of one of the unique ID values that the .plexmatch docs refer to it doesn’t look like it’ll work anyway.
The sqlite database does store the relevant information and it should be simple enough to extract paths and other relevant data from the Hints column as a strong_show_guid parameter to automate building them using a script. I can use this to resolve my specific need. I was just hoping to have it built into the existing UI.