Blue Origin has reused their Shepard rocket 4(?) times.
Their rockect has not gone into deep space.
Nor has Falcon 9. It would be more correct to say that no Blue Origin rocket has been to very high energies though, much less returned from them.
Falcon is in a totally different class of difficulty and complexity. I mean, the grid fins caught on fire and began to melt. That gives you a good idea of what sort of forces are involved in the descent.