Just finished season 1 of this, quite enjoyable.
Some of it is a bit cheesy/American/in-your-face stuff - like the obvious nazi style flags and the "red hats" being like "red coats" reminiscent of the days of the 13 colonies and the British. And the walls, like a literal in your face nod to "divide and conquer".
I do like that you don't really see much of the "aliens".
I wasn't too clear initially on the geography - it seems like the Alan bloke is the "proxy governor" of a block, mostly LA city itself but he reports to an unseen governor-general for the whole LA area - there is another block we know of Santa Monica with presumably it's own "proxy governor", we do see the chief of staff, the blonde woman, who works for the governor-general for the whole of LA.
I guess we caught a glimpse of the governor of the whole of the pacific region too, the VIP:
What I wasn't too sure on is where is the location of the office building Alan went to to meet the Chief of Staff? Is that within his block? Like the overall Governor for the whole of LA area is located within Alan's block too? Or is there some separate administrative block?
There is a green zone but that seems to be block specific and just posh houses for the senior people in that one particular block.
Anyway, it was just a minor thing, just muddled a few episodes in when it occurred as I wasn't sure where he'd traveled to or whether he'd crossed any barriers etc..
I'm presuming there aren't actually all that many "aliens", like they have the drones etc.. and the collaborators but we don't really see them. I guess this is kinda like the days of say the British Empire too - obvs the British administrators weren't completely out of sight but the British Army during that period wasn't particularly big, the empire was completely reliant on local forces, local figures occupying senior government/administrative positions etc..