Upload Large AAB to Google Play Store

We have an android app built on react native. The app contains UnityExport (a module from unity) which is quite large. The total app size (AAB size) is around 800MB.

However, Google Play Store only allows a maximum size 150MB. “New apps larger than 150 MB are now supported by either Play Feature Delivery or Play Asset Delivery.” (see https://developer.android.com/guide/app-bundle/)

We’ve tried to reduce the app size but it is not possible because the unityExport size is so large (the AAB can never be less than 150MB).

We need your help to upload it to google play store.
You can either use Play Feature Delivery, Play Asset Delivery, or even CodePush, etc, as long as the app can be uploaded to google play store.

We can still negotiate the budget if it turns out that the job is much more complex than it seems.