Lot of android build warnings and manifest merge fail

Unity Engine
, ,
1

Basic error is a manifest merge fail which I can only guess at fixing but will try:

* What went wrong:
Execution failed for task ':launcher:processReleaseManifest'.
> Manifest merger failed : Attribute application@appComponentFactory value=(androidx.core.app.CoreComponentFactory) from [androidx.core:core:1.0.0] AndroidManifest.xml:22:18-86
      is also present at [com.android.support:support-compat:28.0.0] AndroidManifest.xml:22:18-91 value=(android.support.v4.app.CoreComponentFactory).
      Suggestion: add 'tools:replace="android:appComponentFactory"' to <application> element at AndroidManifest.xml:5:3-83 to override.

But I notice also in the log it says: (why do these appear? latest 2019 LTS, clean install)

 Configure project :launcher
Exception while marshalling C:\Program Files\Unity\Hub\Editor\2019.4.20f1\Editor\Data\PlaybackEngines\AndroidPlayer\SDK\build-tools\28.0.3\package.xml. Probably the SDK is read-only
etc
etc

Also says this: ?!

Deprecated Gradle features were used in this build, making it incompatible with Gradle 6.0.
2

any help on this?