How to add a policy statement to a ecr repository

[shivam-malvia-polestar]

let policy = new iam.PolicyDocument({
statements: [
new iam.PolicyStatement({
sid: 'CrossAccountPermission',
principals: principalArr,
actions: [
'ecr:BatchCheckLayerAvailability',
'ecr:BatchGetImage',
'ecr:DescribeImages',
'ecr:DescribeRepositories',
'ecr:GetDownloadUrlForLayer',
'ecr:ListImages'
],
}),
new iam.PolicyStatement({
sid:'LambdaECRImageCrossAccountRetrievalPolicy',
effect: iam.Effect.ALLOW,
principals: lambdaPrincipal,
actions: [
'ecr:BatchGetImage',
'ecr:GetDownloadUrlForLayer'
]
})
]
});
const ecrRepo = ecr.Repository.fromRepositoryName(scope, props.repoName + 'repository', props.repoName);

Now there is no method in ecr repo to add policy document, although there is a method to add policy statement.

can someone please help me on how do i add multiple statement or policy document to a repo.