What are your favorite city building / supply chain management games?  Here's a quick list of games I come back to often:
- Cities: Skylines
- Surviving Mars
- Anno 1800
I also really enjoyed 
Rimworld for a while but haven't tried the Royalty DLC.  
Frostpunk is great but in terms of difficulty I usually prefer something a little more laid back to pass the time.  I know this is kind of a stretch for the category but 
Planet Coaster definitely held my attention for a while since I was a 
Roller Coaster Tycoon player growing up.  Also 
Offworld Trading Company even though being more of an RTS game had me addicted for a while.
What do you all like?  Has anyone tried 
Surviving the Apocalypse yet?  How about 
Workers & Resources: Soviet Republic?  Any big 
Tropico series players? (I have to admit I've never tried it)
Also feel free to post screenshots of your beautiful creations here!