can we make 2-3mb game with unity

i am a beginner and i have made many 2D games but even if the game is barely taking any assets the game size is still 20mb i want to know if we can reduce the size .i have only 4 sprite that is around 3mb and still the size of apk is 22mb

Unity has a page on how to reduce your project’s build size: Unity - Manual: Reducing the file size of your build

But yes, unfortunately, I think the Windows/Mac/Linux build takes about 20 MB just for the player alone.