apply_filters( 'render_block_data', array $parsed_block, array $source_block )
Filters the block being rendered in render_block(), before it’s processed.
Parameters
- $parsed_block
-  (array) The block being rendered. 
- $source_block
-  (array) An un-modified copy of $parsed_block, as it appeared in the source content. 
Source
File: wp-includes/blocks.php
Changelog
| Version | Description | 
|---|---|
| 5.1.0 | Introduced. | 
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Licensed under the GNU GPLv2+ License.
    https://developer.wordpress.org/reference/hooks/render_block_data