By reverse Isekai do you mean someone from another planet ending up on earth, or someone thinking they’re from earth but ending up being from another world (and the story takes place in that world)?
if it’s the second I can recommend Reverse Reincarnation. It’s competed and was a pretty enjoyable read for me. Basic premise is MC dies, finds herself on another world, but finds out she’s originally from that world and the earth life was the equivalent of an astral journey before she resumed life on the other world. It’s a cultivation novel if that matters
Returning to a previous life she doesn’t remember, Tori wakes up in a fantasy world as the heir to an empire. One where magic called cultivation rules. While doing research and kickstarting an industrialization, she has to deal with a family of transmigrators, politics, and spirits. Maybe she’ll...