If ACF did that then a theme that did not use those fields would still load them. If this is a requirement for your dev environment then it’s something that needs to be done using the json load/save point filters that the developer has given us. Alternately you might try https://github.com/khromov/acf-local-json-manager
Welcome to the Advanced Custom Fields community forum.
Browse through ideas, snippets of code, questions and answers between fellow ACF users
ACF PRO’s Flexible Content field allows you to create smaller pieces of UI and compose them into whole flexible patterns. In our latest article, we show how to use it to create swappable site sections and integrate it all in a theme.https://t.co/ZRocH8oJSp