STATUS OF WORMHOLES 2020. “Presently, there is no evidence of the existence of WHs. Pedagogically they are very interesting and students studying GR are most often exposed to their studies. It is expected that when quantum gravity is better understood that BHs, WHs and wormholes might play an important role in our understanding of spacetime and perhaps even in understanding the origin of the Big Bang.” (GR = General Relativity; BH = black hole; WH = white hole).
https://link.springer.com/chapter/10.1007/978-3-030-51081-7_62