Seems currently there is no way to enable/disable point-in-time recovery setting with AWS Cli or API:
https://docs.aws.amazon.com/cli/latest/reference/dynamodb/restore-table-to-point-in-time.html
You must manually set up the following on the restored table:
Auto scaling policies
IAM policies
Cloudwatch metrics and alarms
Tags
Stream settings
Time to Live (TTL) settings
Point in time recovery settings . <====