Most wonders are in urban areas right? You don't usually build a huge church or something in the middle of nowhere
One of the problems with Wonders ever since Civ VI came out - when they started expanding cities by districts - is that they represent a variety of locations.
As said, some require access to lots of people - urban tiles, so to speak - like the cathedrals and temples: Notre Dame to Mundo Perdido. Others are very rural monuments: there was no city on the plateau where they built the Pyramids, (a worker's village while they were being built, but that's all) or Terracotta Army, or the Pythian Oracle.
Ideally, each Wonder should have a requirement to build that includes the type of tile: not just 'vegetated' or 'tundra', but also Urban or Rural.
And Urban placements should get increasing bonuses the more Urban tiles that are adjacent to them - the closer they are to the center of town. After all, neither Notre Dame nor the Pyramid of the Sun were built out on the outskirts of the city, they were/are right in the middle of everything, where the maximum number of people could get to them for ceremonies.
Rural Wonders, like the Oracle or Pyramids, don't require access to maximum numbers of people all the time, but are centers for activity on a ceremonial basis, so they could get extra bonuses based on the number of settlements within X tiles - people still need access on special occasions, just not weekly.