Hi @kmdg
You should be able to include ACF to your theme/plugins by following this guide: https://www.advancedcustomfields.com/resources/including-acf-in-a-plugin-theme/.
You can also register the field groups through PHP so that the user won’t be able to update them. This page should give you more idea about it: https://www.advancedcustomfields.com/resources/register-fields-via-php/.
I hope this helps 🙂
