Once you've created a .tsx file for your block, it'll automatically be registered with WordPress, and is available to be targetted by ACF field groups.
- Create a new ACF Field Group
- Make sure the block title starts with
Block:— this is just convention - Add any fields you like.
Adding an ACF Field Group for a Block
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We may add the ability to have ACF Builder support for blocks at some point, however for now it's recommended that you use the ACF Interface to build fields for your blocks. ACF Builder is an advanced tool which requires that you have a deeper knowledge of ACF and all of it's configuration options, and may be harder to use for ACF newbies.