Those sort of bumps between the toes can be normal. If there is no redness/puss/infection or a black head signifying bumblefoot it is normal. Most importantly if it doesn't bother the chicken, if there are no signs of discomfort - raising the leg, looking at the leg, standing on one leg, etc.
I have an Easter Egger with such bumps on both feet and she is healthy, happy and has no issues. She has had them for years. I've had other chickens with a bump on one of the feet without any issues. I never figured out what they are, probably fat deposits or calcified cysts. They are too similar between different hens to be random injuries though. Could be something genetic/breed related as well.
If the chicken is not bothered by it and the are no outward signs of a problem just leave it be.