That's a bannable offense according to Google's policies
"Apps or third party code (e.g., SDKs) that download executable code, such as dex files or native code, from a source other than Google Play."
If someone thinks it's an overreach, read about cases when apps were banned due to a link to another Google Play app from the same developer [1]
[1] https://www.reddit.com/r/androiddev/comments/atsju7/linking_...