Identify If the Block is rendered from FSE template.

[abhi3315]

I have a requirement where I have a particular block added to the FSE template. I only want to render this block from FSE template if the same block is not added to the post content. If the block exists in post content then don't render the block from FSE. To handle this I can set an attribute to the block like isAddedToTemplate if true then use has_block function to check if the block exists in the post content.

But I am looking a way to identify if the block is rendered from the FSE template without using any attribute like isAddedToTemplate. In editor I can use if postType and postId contexts exits or pagenow is 'site-editor' but I am not able find anything similar in the render_callback.