I’m building a CPT that has a required post relation field (single select) and I want the post title to automatically use the selected related post’s title — but only after the post is created (not on the front end form).

What is the best practice hook or filter in Voxel to run after the relation field value is saved, so I can safely update title with the related post’s title?

I want to avoid wp_insert_post_data (because relation meta isn’t available yet at that point) and I’d prefer not to rely on JS autofill.

Is there a Voxel-provided action/filter (or recommended WordPress hook priority) for this scenario?