Did you know that you can use ACF in your plugins and themes as well? Both the premium as the free version can be used. It’s quite easy, just create a folder in your plugin (in the example below we’ve used libs/acf/) and add the ACF files in there. Then we’ll have to add some includes and filters.

Full example

What are the rules for including ACF?

More information on including can be found in the ACF docs, over here: https://www.advancedcustomfields.com/resources/including-acf-within-a-plugin-or-theme/