If you asked copilot to reproduce an existing work, then surely that violates copyright - in the same way you can ask SD to reproduce one of the training data (which would violate copyright in the same way).
But both the training, and the usage of these ML models do not violate copyright. Only until someone produces a copyrighted works from it, does that particular _usage_ instance will violate copyright, and it does not invalidate any other usages.