Earlier quoted context omitted.
Didn't know about sunshine request - the website[1] - until I searched for this term! [1]: https://www.sunshinerequest.com/
This is just FOIA. You don't need any special website or process; just Google [(your state) FOIA] or [(your municipality) FOIA officer]. In Illinois, you can simply email free-form requests for documents and start a 10-day clock on the public body's side.
If nothing else, the Sunshine Request site is a good place to get form emails for these requests from.