It's not a sport by sport thing, it's an overall funding. In order to have a valid complaint, you have a net situation where the girls programs as a whole get less money than the boys programs. Most school cover this by having more girls programs than boys programs. So something like cheer can take a lot of funding.
But usually it's that a school has a girls volleyball team, maybe a girls gymnastics team, a cheer squad, field hockey, whatever, to balance out the actual funding. Since there aren't scholarships involved, it's usually a matter of coaching salaries, facilities and uniforms. Travel costs can factor in, too -- the school pays for busses for the softball team but not the baseball team, so the baseball team has more money to spend on things like uniforms. A lot of it can be really sneaky, but the balance aspect goes both ways. If they start increasing the softball uniform budget, then a budget on the boys side would need to go up, too.
But usually it's that a school has a girls volleyball team, maybe a girls gymnastics team, a cheer squad, field hockey, whatever, to balance out the actual funding. Since there aren't scholarships involved, it's usually a matter of coaching salaries, facilities and uniforms. Travel costs can factor in, too -- the school pays for busses for the softball team but not the baseball team, so the baseball team has more money to spend on things like uniforms. A lot of it can be really sneaky, but the balance aspect goes both ways. If they start increasing the softball uniform budget, then a budget on the boys side would need to go up, too.