Is there a certain time you need to be viceroy before the trophy pops up? Been viceroy on Flan for a while and the achievement still hasn’t triggered.
Try to leave flan and then enter it. Thats how i got mine (pc)
If that doesn’t work, try to walk out of the settlement and reenter it again. (Not by portal or warp)
The objective to enter a capital also works this way, warping or portal into a capital doesn’t count.
Thanks, warping got it for me.
I had to rename settlement before it popped for me.