I think what you might be facing is due to the API changes in Android 12. According to this article on xda-developers
Google says Android 12 will always open such non-verified links in the default browser instead of showing you the app selection dialogue.
To fix this, you'll need to verify the ownership of the domain by adding assetsLink.json to your domain.
https://developer.android.com/training/app-links/verify-android-applinks