Gravity occurs when matter distributes its mass into the space around it, to bias the natural tremble of other objects towards itself, but mass isn’t the only property of matter. It follows that electricity and magnetism could occur in a similar way, based on other properties of matter.
QR5.5.1. Electro-magnetism
QR5.5.2. Remainders Spread
QR5.5.3. Spin Spreads
QR5.5.4. One Field For All