There is no good reason for this and this will cause a large amount of issues, let alone the pain it causes to the families affected by it.
This doesn’t seem purely populism for the anti-lgbtqia+ crowd, it seems too nuanced for that. I’m guessing it’s waiting until a high-placed official of the catholic church voices his support for Meloni during her next campaign.
EDIT: It already happend, she was endorsed by a Cardinal and several other members of the Italian church.