Most iPhones now have the API available, but for some reason it has fallen to the states to provide apps that work with those APIs, and (no surprise) 90% have elected not to. I expect the feature to be quietly dropped in a future release since it's clear nobody really wants it.
“In order to use the Exposure Notification APIs, You must be a government entity, such as a government health services organization, or a developer who has been endorsed and approved by a government entity to develop an Application on behalf of a government for COVID-19 response efforts. Entitlement Profile(s) are limited to one (1) Application per country unless the country has a regional approach, or as otherwise agreed by Apple.”
