The idea itself of supporting Europeans alternative to face American and Chinese tech giants is by itself noble (and I think necessary).
However, the usual way it is done is a disaster: top-bottom, funding some existing behemoth company that will have no capacity whatsoever to innovate, nor will to do so. But they will get the money because they have good connections.
If you think about it, it is not very different of the American military-industrial complex and the way the DoD/Army/DoE fund their programs (F-35 ?).
Creating a good environment for startups and giving grants to several ones in parallel to create an internal competitive market would be both cheaper and more effective.
But that would imply first a generation switch....