Help! How split xapk, if inside armv7a or armv8

Hello, there is such a question. For example, I downloaded a game, but it has the xapk extension. But inside it is not an obb archive, but a part of the libraries, .so. while it is an apk application. I tried to separate them, modify them, and then connect them together on the phone using an app. But unsuccessfully. Does anyone know how to deal with this?