I believe that AGP 8.2.1 has some compatibility issues with Kotlin 1.9.20.
Also BaseVariant API was deprecated and basically removed in newer AGP versions.
To fix your build you should align your Kotlin version with your AGP version, all the info can be found via this link: AGP, D8, and R8 versions required for Kotlin versions

To further fix your build you should update your Gradle Wrapper to 8.6
distributionUrl=https\://services.gradle.org/distributions/gradle-8.6-all.zip

and also update your android/build.gradle to the right version:

buildscript {
    ext.kotlin_version = '1.9.22'
    repositories {
        google()
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:8.6.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}