Discord isn't scrapping its plans, just assuring people that one of the vendors they trialed in a sub-market they aren't moving forward with globally. They've been trying for a multi-vendor solution from the beginning and k-ID is the vendor they've been much more publicly happy with than Persona.
(Also, from that post most notably mentioned about the global rollout is delayed in light of some of these vendor verification issues and also hoping to rollout a few more features to even further lesson the need for age verification by many users. One such feature being first-class opt-in "spoiler channels", which some servers had been using age restricted channels for that rather than opt-in roles and somewhat more complex role-based permissions.)
Today Discord also released a rather comprehensive (and good) recap of the plan so far, their apologies for some of their messaging mistakes, and what comes next: https://discord.com/blog/getting-global-age-assurance-right-...
(Also, from that post most notably mentioned about the global rollout is delayed in light of some of these vendor verification issues and also hoping to rollout a few more features to even further lesson the need for age verification by many users. One such feature being first-class opt-in "spoiler channels", which some servers had been using age restricted channels for that rather than opt-in roles and somewhat more complex role-based permissions.)