What can an electric guitar practice?

You can practice jazz, speed playing and scales.

Jazz is usually a voiceless guitar, and I mean pure jazz. You can practice music, or chord progression and improvisation.

Fast play and scale can be grouped together. Many people like to practice speed playing with unvoiced guitars because some sounds may be fooled if they are distorted, but if they practice with unvoiced guitars, they can clearly know where they need to be connected, so it is precisely for this reason that some foreign guitarists can even play the box piano quickly.

Then you can practice breaking chords or something.

In short, unvoiced sound, distortion and overload are just the timbre of the guitar. Tone can help you play the guitar well, but it will never prevent you from playing or practicing.