A magnifying lens will collect the light and concentrate it. A bit like a funnel.
If your lens collects over a larger area than three panel would otherwise see then yeah you probably will get more energy. You’ll essentially have just used a bigger solar panel.
(This ignores a few things like efficiency, but never mind).
It’s also possible that you just burn a hole through the panel too, as the sun can have a lot of energy when focused!
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