Just extract it... How do people in almost 2023 still not know what a WinRAR file is. Your apk is inside of it dingding.
Well, in 2023, the internet moves SO FAST that there's no longer a significant benefit to using compressed files. It's ancient technology built for floppies, compact discs, 20GB hard drives and dial up or DSL internet. It should be more of a surprise if people are still using it than for someone to not know how to use it.