hii! I am by no means an expert but I think what they need is just a bit more in general, to make the space feel more dynamic.
for example with the fruit stand maybe add the fruit basket (I may have a spare recipe if you don’t have it, or can craft it for you) and maybe some of the fruit boxes (I have pear, apple and cherry if you want any) maybe the infused water dispenser?
another thing that could work there is for the fruit stand to also maybe have a little juice bar - you could incorporate a cutting board and blender and maybe a coconut drink or two (maybe the st Patrick’s day drink would work too?), and it would also be a chance to put a little table or two (or maybe the diner counter table). A festivale umbrella might look good there too (since this is on the beach after all it just seems like it needs to feel a little beachy) - though I know that may be a little too tropical for what you are going for.
For the honey stand, personally it would make more sense to me located on the grass. Among the trees or on the other side. You could add a wasp hive (though those don’t look much like honeycomb, maybe a custom hat trick of some type would be better?) maybe some candles would work there (unlit) as if they are beeswax candles? A honey bee model might be cute too?
For the work shop, perhaps you could mix in gardening tools? To make it feel more full and multi-purpose, you could place an axe or watering can and custom design a cushion to look like come kind of material for whatever you want to workshop to be working on. Or maybe the kettle tub would fit in somehow (it always looks less like a tub than some industrial contraption to me).
out of curiosity, is there a story on why the workshop in on the beach rocks? I think if so, incorporating that into the design would be a good way to make it feel natural, as if it fits into the broader ‘story’ of your island.
Not sure if any of that is helpful. What you have doesn’t look bad, not at all, but I think adding a few more varied items could help with filling in the spaces so that they feel more natural and like living locations.