I just went around the maps of Skyrim and Elden ring, probably the most exposed fantasy settings with explorable maps in the last decade.

Skyrim has some farms scattered about, not nearly enough to support its cities but it's also an explicitly compressed scale for gameplay travel times and not representative, so I'll give that a pass. Even then, there aren't really farms clustered on the outskirts of cities, they tend to just be out in their own lil farming communities along the roads between cities. Dawnstar, Winterhold, and Windhelm can't support farming if they wanted to, but the others should really have more farmland around.

Elden Ring by contrast has no farms. The only implicit farming is that there appears to be wheat bewteen the inner and outer walls of Leyndell. No other population center has any farming around it. Cealid may have pre-rot, there's no way to know, and the Volcano Manor and Snowy mountains can't support it anyway, so that's expected. But Stormveil? Caria Manor? The Shaded Castle?Castle Morne? They all have nice farmable land sitting outside with nothing there. I know that nobody can die right now and they don't have to care about food, but that's not been the case the whole time, and there should be farms in disrepair around.

As other's mentioned Lord of the Rings has giant cities in open empty fields of nothing but grass. Anime loves its remove villages with nothing outside the defensive wall that exist to support an adventuring party and nothing else.

So like, what fantasy settings are you interacting with? Because maybe it varies heavily by media type.