vb87m keymap with fn / function key

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Hello all,

I'm not sure how popular the varmilo vb87m or va87m (I hear they are near the same, just bluetooth v wired) are here, but I was hoping someone knew whether it is possible to keymap additional keys with the [Fn] (Function) key built in to the keyboard. It comes pre-configured with some Fn+ macros, but I want to add further ones, such as Fn+A through Fn-Z or Fn+Insert, etc...