Got "block transforms" working in #RSVPMaker for #WordPress for one-click transformation of event listings to a version based on the Query Loop block (my variation, with or without a calendar grid). Allows for much greater design freedom.
One victory: figuring out how to turn a single block into a templated result including multiple blocks. Required some digging into the scant documentation on a JS function called createBlocksFromInnerBlocksTemplate.
Here's the block transforms code I used to turn a single #WordPress block into a Query Loop block with innerBlocks for the Post Template. The documentation covers the case of converting one block with innerBlocks to another. Here, I had to create the innerBlocks option using a template (similar to the process of creating a multi-block block variation) #Gutenberghttps://gist.github.com/davidfcarr/e6336ef4fa255d9034d7bab6e3a08e56