The Luca app really is a complete train wreck. And what's worse is that the federal governments don't even have any direct control over the app itself, they just bought access to the contact tracing data for 12 months from the company operating the app. Meanwhile the company controls the app and all connected user accounts and can repurpose it in whichever way they see fit (and they already announced they have plans for the app beyond the pandemic).
It's absolutely mind-boggling to me how our government(s) can get the idea to "rent" contact tracing data from a private company like this, it just reeks of corruption. I wasn't a big fan of the Covid tracing app in the beginning, but in retrospect the concept of that app seems miles ahead of the current situation with the Luca app.