Best Practice for Migrating OCM Site Updates

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Hello,

Say there are two OCM instances, Dev and Prod, both with identical sites. We would like to make an update or set of updates to Dev (adding components, changing component settings, and adding static assets to pages), and then push those updates to Prod.

Do these updates need to be manually applied on both instances, or is there a way to export/import site updates? My guess is to use the CLI to create a new template from the site on Dev, download the template from Dev, upload the template to Prod, and update the site on Prod to use that new template. However, in my experience this is a very long process and has not worked to apply any changes.