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.
libs/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/