Hey there FaultedBirch573, short answer yes and I’m going to show you how to go about this first off while in the world map once you have your flight plan setup and wish to save it.
simply click the more option at the bottom of your screen
Next a Save/load option will load click it
And this little menu should show up.
Additionally if you intended on using simbrief to load a flight plan from within the game for the CRJ mod.
https://www.simbrief.com/
See this video.
Have a great day.