I run into this in periods due to working too much and just not having the energy. The key for me is to give up on any intellectual ambitions for a while, and just go for something that’s quick and easy to read.
After I’ve started reading regularly again, I can then ramp up the difficulty until I suddenly reach that stage again where I feel like “it’s weird how I just don’t read anymore”, and I have to start over.
I really loved A Psalm for the Wild-Built by Becky Chambers.
It hit me right at a time when I needed it, and made me feel that change might actually be ok.