expectation failed

Bonus points if Anyone can link me to the page I used a few years back that had all sorts of privacy enhancing and telemetry disabling option on the left side and would create a reg file for applying those changes on the right

Sounds like https://privacy.sexy/ might be the answer?

If you are a Florisboard user, there is a version with dynamic Material You themes here. It’s really good while we wait for the new versions with this official built-in