I'm compiling the wheels only for some python versions and arch, so maybe it's not available the one for your setup. Here you can check the support matrix: https://rust-nostr.org/nostr-sdk/02-installation.html#support-matrix

If miss your one, you can compile the wheel by yourself: 
* Clone rust-nostr repo
* `cd bindings/nostr-sdk-ffi` (or `cd bindings/nostr-ffi`)
* Install `rust` and `just`
* Run `just python`

The wheel will be located in `bindings-python/dist`