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The Page curve is reproduced from within semiclassical gravity

node

Independent groups showed that including previously neglected saddle points in the gravitational path integral - configurations that came to be described as replica wormholes, with the resulting prescription known as the island formula - yields an entanglement entropy for the radiation that follows the Page curve rather than rising forever. It is widely regarded as the most significant development on the information problem since it was posed. It is not a resolution: the calculation tells you what the entropy does without identifying the mechanism by which information leaves, and the physical interpretation is disputed.

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/atlas?object=EVT_ISLAND_PAGE_CURVE_2019