This feature is added to the development queue and our development team will work on this feature. Hopefully, it will be available as soon as possible.
also hopefully awaiting this feature. said to my customer metabox is better than ACF and now MB blocks in template parts not working. workaround is to make patterns (i.e. inserting and editing the block inside a post and save it with WP feature in a pattern) and use the pattern in template/part/s. but that's not the way ...
I never thought I would say this one day BUT: I am VERY HAPPY with ACF now. getting much better block functionality with ACF and can use all ACF-blocks in FSE templates and template-parts. this is an IMPORTANT feature for developers.
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