Did you click the link? There's a Group Product Manager explaining that it's a huge amount of work, they want to do it, and can't do it now. After the lead eng on the feature gave a detailed description of the work involved (20 teams were sucked into it).

Every engineering org has things like this – features that they know the customer rightfully wants and should have, and seem to the customer to be simple, but in reality bring your eng org to its knees.