How to register a block template part from plugins?

[daviedR]

Since WordPress 6.7, there's a new register_block_template API which can be used by plugins to register a custom block template.

But how can we add a block template part from plugins?

[talldan]

Sorry for the delay in replying. Adding a register_block_template_part function was considered, but there's some discussion about merging the concepts of template parts and patterns, so in the future, I expect this will be possible via register_block_pattern.

[daviedR]

Thanks for your reply!
Is there any ETA on when the merging will be implemented into the core release?

[talldan]

I don't have any timeline, it's also difficult to provide a stopgap measure because of the way backwards compatibility in WordPress works.

I know there are still ways to add template parts via filters, I think WooCommerce does this, so that might be something to look into.