General Aviation Airports ?
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One really nice one from Aerosoft in Europe:
https://www.justflight.com/product/aerosoft-airfield-lido-di-veneziaAll freeware airports by vbazillio:
https://flightsim.to/profile/vbazillio -
Just have a look at flightsim.to, there is also a scenery map. There is also a lot of payware around.
Since FS2020 the freeware market absolutely exploded, for GA flying it's like heaven. Only downside is that A2A are more or less dead, but BSq is taking the lead..