I purchased Meta Box Build specifically for the ability to export custom fields as code that can be added to functions.php or a custom plugin. Was quite surprised to see that Repeatable Fields are not available unless purchasing another MB product.
If I purchase the MB Repeatable Fields plugins, will Meta Box Builder be able to export those repeatable fields groups as code?
The end goal is to get repeatable custom fields into WPGraphQL API, which should be possible if I have code definitions of the meta fields (including repeatable) created...
Meta Box does not support a repeatable field, I think you are talking about the cloneable field, please read more here https://docs.metabox.io/cloning-fields/
It is a native feature of field settings, which means any field can be cloned, no need to use a specific field. And of course, it can be generated to PHP code.