I’d propose a history for recent filters used in the graph view and a way to save them to your vault (in case you have a lot)
If you frequently run a lot of filters from the graph view, you don’t want to type them again everything (in case of some complex filters logic) or don’t want to store them in a file to copy-paste them every time you need them.
A history with the most recent queries (like it’s done for the notes search panel)
history + saved filters like proposed above
have a note with the queries to copy-paste them when needed