Hey there, I'm bad at forums. Please forgive me for failing to put this where it ought to go, if there is a better place, but I wanted to make this suggestion public so hopefully someone who can implement it gets to see it.
I think it would be good for Client Orders to have, in their text (specifically in the yellow section), a quick summary of what location (planet) you can find the relevant objectives in.
For example, the Pajigowan enemy. If the CO asks for a certain number of Pajigowan to be hunted, it could include a bit of text to the effect of, "Can be found on Planet Harkotan," as well as the information pertaining to what level it has to be to count.
This would alleviate the issue I see people having where they can't easily figure out where they have to go due to not knowing what these names refer to - which is natural, as PSO2 has some very distinctive, but not at all helpfully descriptive names for its creatures. It would be good for such a thing to be present for any Client Order where you have to know where to go to do anything, even fishing or harvesting, and would save everyone a lot of time and hassle.
As you can see, it needn't be so direct as to the very most exact location of the objective - it simply has to provide you with a guide in the general direction. From there, the player can narrow down their search through Quests to what planet they need to go to, and then from there, narrow it down further by looking at the Quest details to see where the enemy they're looking for appears, if that hasn't already been sufficiently pointed out by the "you have Client Orders here" icon.
Apologies again if there is a better location for this.