One thing I'd like to change is to be able to choose the hex where the mercenary appears when he is recruited (near a planet or elsewhere).

In the game, the mercenary appears in a hexagon close to the capital.

Would it be possible, by modding, to choose the hexagon where the mercenary will appear as you do with the use of certain artifacts (select the hexagon as a target for the action of the artifact, for example as the artifact "Nanite Transmitter" which generates a ship anywhere on the map)?

And the same for positioning ships that are obtained with a government.