How are prints enabled for all deployment running on cloud without enabling them at flow level ? Do we prefer print or loggers in general ?

You can set in your profile or an environment variable. I like logging prints, personally.

So when I create a deployment with "log_prints=True" at profile any deployment and future schedule which I create will have logs coming in cloud logs even for scheduled runs ?

that should be the case

Okay. So no server side/cloud level config. Its with the profile of developer. We will test this out