Are you the developer?
No lmao.
I just know this from having a Chromebook myself and going down the whole "Chromebooks are android devices" rabbit-hole myself.
Adding onto what I said before, Chromebooks are essentially android tablets with a keyboard, and Google disables the usage of .apk files for user-safety reasons(unlike literally every other android), but that's where dev mode comes in.
afaik, There is no possible way that I know of to install a non play store app onto a Chromebook outside of dev mode. Google just hates fun. :P