I find myself using several filters routinely. Within a shotcut session, it’s possible to copy the filter stack from one clip, and paste it onto a different clip. This works between different projects, too.
But there’s no persistence between shotcut sessions. Each time you start a new session of shotcut, you have to add the filters one-by-one.
It would be helpful to save a filter stack as a preset to be able to apply them quickly in a new shotcut session.
Maybe of interest: in this video I show how I use an empty mlt file as a “template” so that I can use the same filters on all my projects. Maybe you can adapt that somehow to your need.