Fuel Gauge Not Working Street Triple Rx

I agree with DD on where to start, but I would also look at fuses first - just in case it's something really simple. You didn't say what year your bike is, but I came across an online manual for a 2009 at the following link. I hate using these types of sites for security reasons. If you're inclined to use it, just scroll down slightly and you'll see a download button.
https://docslide.com.br/documents/workshop-manual-street-triplepdf.html

 

It can take up to a couple of miles to read after disconnection. On other models anyway.