FL Studio includes a wide range of plugins: generators, tools and effects. However most of these are FL Studio format only. Which means they only work in FL Studio.
If they are available as a VST or AU format plugin this will be listed on the product page here.
See also: What is the difference between an FL plugin and a VST or AU plugin
Since 2021 FL Studio plugins are no longer available for purchase in VST or AU format.
An alternative is to use FL Studio as VST / AU in other VST / AU hosts. This will give you access to the FL format plugins. You can download the Trial and test this for yourself.
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