There is a lot of argument on here about how serious this was, which mirrors the entire Covid debate to some extent.
But the real loser here will be Foden himself. The entire aim in international football is to get to the tournaments, euros and world cups. That normally involves weeks and weeks away in hotels. He has demonstrated to England that he is not yet mature enough for that environment and there is not a chance of him going to the euros now as a result. That is a great shame for him, hopefully city will benefit as he strives for redemption in the future.