I would suggest turning on error debugging. It will likely show you some PHP errors in the above code.
It appears that in the meta_input array you’re calling things like update_post_meta() before the post even exists. In those functions you’re calling the $post_id variable and that also doesn’t appear to exist.
On top of that, the update_post_meta() function will return a boolean ( likely true ) if it can insert, or false ( empty ) if it cannot update the postmeta.
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