This was fixed for me some time ago (I previously reported it on Xbox Series S in 2021) but it's started again since patch 1.82 on Xbox Series X (all content except for V/BTD).
The wild plants don't all produce harvestables at first, then they eventually do produce harvestables but then stop again after a few days if my Sims remain in the location. They are currently hopping around different areas of Granite Falls and they needed more harvestables to make herbal remedies. None of the plants will produce more harvestables now. They are in season, in fact I deliberately sent my Sims there at the right time to get the summer plants.
Sulani is also affected with all plants rarely producing harvestables, again with Sims staying there and living there.
I've got more locations to test as my adventurous Sims are camping in various destination worlds.
