triodos has been coming up lately multiple times, so the few support requests at their end probably prompted that change in conditions to not be liable.
It’s just the ecosystem… google offers businesses useful APIs to safe on required effort (face detection) and business start to depend on it, without alternatives in their processes. This stuff (what Google is now packaging as MLkit) isn’t easy to rebuild opensource.
You can follow down this link to a github issue that has all the details, but the gist is, face detection will be hard to come by in microg in my opinion - Problem with Camera on Triodos Banking App