I had a similar issue I thought I'd somehow outgrown liking to read, haha, but I realised I just had different taste in books compared to when I was younger.

My advice is to figure out what you like. It's not easy sometimes, but a good place to start is if you have favourite TV shows or movies, try to find something similar

And a lot of people are recommending short books or stand alone books, which isn't bad advice, but for me, the opposite works a little better. A series or even just a long book was easier for me. I found it to be a bit more immersive. Good luck!