Unfortunately, Montevideo is very poorly represented, we don't have photogrammetry either, so little by little we are introducing objects from blender to try to give some points of the city a more realistic touch,that is free to download at 3dwarehouse.sketchup.com and that I have imported into MSFS!
in this pack: 
- IGLESIA DEL CERRITO 
- EDIFICIO IMM
- TERMINAL BUSES 3 CRUCES
- OBELISCO
- ANTENA CANAL 4 ,CANAL 10
- EDIFICIO LIBERTAD Y CUERNOS DE BATLLE     
- TORRES RAMBLA SUR

all my addons from Uruguay complement perfectly with those from @unTopo