There is a serious obstacle to launching Libra in the form of the US securities Commission. They don't want crypto projects to replace banks. That is why they are fined and not allowed to implement such projects. Mark Zuckerberg has serious connections in the us Congress, he may be able to overcome all the obstacles, but this will not be done quickly.
zuckerberg will not be able to reach agreement with the congressmen
the influence of large American banks there is much stronger than the influence of Facebook
bankers do not want to give Facebook a powerful leverage
which, according to preliminary estimates, could be $ 5-10 billion in the first few years
bankers will not want to lose their influence, so Libra is doomed to failure.
Facebook is very important both for users and for special services that use Facebook to influence other countries and collect dossiers on the people they need. This is why Mark Zuckerberg's influence in government circles is great, and I am sure that he will achieve his goals.