If you export to OTF, all components are decomposed (CFF based OpenType fonts don’t support components). For TrueType, all components that overlap or with rotation, are decomposed.
But you might need something else. Disable the Export checkbox for all the glyphs that you use a building blocks for your glyphs. That way they don’t end up in the final file.
This topic returns: Maybe “Decompose Components” option or “Decompose Smart Components” option is reasonable for UFO exports? for example: I’m using a lot of smartComponents. Ufo-export messes up with smart-options.