If you know his salary when the order was done, you can probably interpolate it given the increases. If he made $100k/year, say, then he's only making less than 3% more. Any increase would likely not be much.
I'm pretty amazed that he has stepped up and been a better father than I ever expected and he does pay his share of things like medical bills and swim lessons without too much nagging and he buys her shoes and clothes and stuff when needed. So I don't want to rock the boat and be petty for a couple of bucks and threaten our decent co-parenting relationship right now.
I would take that as a good thing. I pay CS but my ex owes me about $4k in shared medical expenses thus far since 2014. I paid for all of our son's ABA therapy co-pays, and recently orthodontia which she said was unnecessary, contradicting the dentist (with no ties to the orthodontist) who said he'd have to have a tooth pulled if his jaw wasn't widened.
How he manages his finances is his business. The court will likely agree. It's math. I've admitted my bias as a payor, but if he's meeting his obligations unlike my ex, I'd let it lie for now. If he got a huge pay bump, that might be something to consider.
I'm making a little over 10% more than when we filed, but I'm responsible for dental and medical insurance, and the latter has increased by about $200/ month for me since then.