After crwating new project in flutter in project root bild.gradle file have no define buildscript

[Mitpatel13]

After crwating new project in flutter in project root bild.gradle file have no define buildscript how can i get this type of
buildscript {

ext.kotlin_version = '1.9.10'
repositories {
    google()
    mavenCentral()
}

dependencies {
    classpath 'com.google.gms:google-services:4.4.0'
    classpath 'com.android.tools.build:gradle:7.1.3'
    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:${kotlin_version}"

}

}

[mo7amedaliEbaid]

Let me understand,
you created a new project, and transferred the dart code and pubspec.yaml to your new project,
then you faced this issue.
is this what happened ?!
@Mitpatel13