If you want your cities in Civilization 6 to grow, you will need to have positive amenities, so here is how to get amenities up in the game.
How to get more Amenities in Civilization 6
To get amenities, you will need to have happy populations in your cities. Getting happy populations will require you to have specific resources and a few other sources such as entertainment and religion.
Certain great wonders will give you a boost, such as when you build the Alhambra that gives plus two or the Colosseum that gives plus one plus one to all cites six tiles from the city where it was built. You can also build entertainment buildings such as arenas, zoos, and stadiums to gain amenities as well. We especially recommend building the zoos and stadiums along with the Colosseum great wonder as they all get a boost of amenities that can reach cities within six tiles.
For luxury resources, all you need to do to get them is have a city built on top of a tile where a resource is located, and once your city is built, you will get a plus-four to amenities for the luxury resource. This also applies to all luxury resources, so it is highly recommended to build on luxury resources titles whenever possible, as along with the amenity boost, you will also get extra resources to trade. That being said, here's a full list of all luxury resources in the game.
All Amenities in Civilization Six
But, you won't always find luxury resources in your starting area in the game, so we recommend relying more on the building route along with researching a few tech trees. For example, Retainers will provide you with an amenity boost for cities that have garrisoned units, or the New Deal that provides boosts for amenities for all cities with three specialty districts.