Entanglement in quantum mechanics does indeed exist between two particles that are physically separated by large distances. This phenomenon has been experimentally observed and is known as "spooky action at a distance" as famously described by Albert Einstein.
Entanglement is a fundamental feature of quantum mechanics that describes the correlation between two or more particles, regardless of their separation. When particles become entangled, their states become interconnected in such a way that the measurement of one particle's state instantaneously affects the state of the other, even if they are located far apart.
However, it is important to note that while entanglement can transcend spatial distances, it does not create or modify spacetime itself. The concept of spacetime is a fundamental framework in physics that combines three dimensions of space with one dimension of time. Entanglement is a property within this spacetime framework and does not alter its fundamental nature.