Why no contact tracing

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I need answers. I am no antivaxxer but it's getting ridiculous with mandates and 3rd dose talks around the world. Consider that the side effects are not negligable what other option is there?
Well what about digital contact tracing. I read a bunch about it and the only problem with it is that there are privacy concerns. I would consider that a minor issue in comparison with the tens of thousands who have strong negative side effects from the vaccine. What I read suggested that it was a very effective method to combat the pandemic so why is there no tracing mandate but politicians want to mandate the vaccine. Also the tracing was ready for worldwide use in may 2020, can be adapted to every new variant and costs virtually nothing. I can't find a good explanation except stupidity, corruption or incompetence. Do you know more about this situation?