Nobody (including the proprietors) seems to have paid much attention to the privacy implications of the data produced by contact tracing tech. Its being sold as, "more surveillance = more freedoms." Not as, "we worked hard to make this privacy preserving, here is the OS code".

Here's a great thread on the cautious approach from Apple and Google - https://twitter.com/benadida/status/1249067484679794688?s=20