In the context of our current understanding of physics, the concept of "escape velocity out of our 3D universe into infinity" is not well-defined. The notion of escape velocity applies to objects within a gravitational field, such as a planet or a star, trying to escape from that specific gravitational field.
However, the concept of escaping the universe or moving into infinity falls beyond the scope of classical mechanics or general relativity. Our current understanding of the universe is limited to observable phenomena within our known spacetime. The idea of objects escaping the universe as a whole or moving into infinity is speculative and not supported by scientific theories or evidence.
It's worth noting that the concept of the universe itself is a subject of ongoing research and investigation in cosmology and theoretical physics. As our understanding progresses, new insights may emerge, but at present, we do not have a well-defined notion of escape velocity from the universe.