Would it be possible to override the categories field on added Exceptions?

I've found a workaround using Regex in the parser config to achieve what I want but would prefer the ability to manage it in the Exceptions interface as the more games I add the more cumbersome the Regex becomes to update.

I setup a parser to add the games I have in Lutris (on Linux) which contains all of my non steam store games (eg GoG, Epic, etc) and would like to categorise them by the store source;

${${/^(?:(?!Epic).)*$/|${/(alien\-isolation|satisfactory|rogue-legacy$|absolute-drift|among-us|cave-story|celeste|sonic-mania|a-short-hike)/|${title}|Epic}|${/^(?:(?!GOG).)*$/|${/(divinity-original-sin-2)/|${title}|GOG}|Other}}}

Side question, is there a way for me to submit my Lutris parser as a template? I noticed there wasn't one in the templates section.