Yes! I have used Tim's group for math and absolutely love them. His group is all about accelerating learning and helping gifted kids. I know they do chemistry too and list their subjects on the site. It's called Touchdown Tutors and the link is: https://www.touchdowntutors.org
Virtual summer learning programs are a great way to keep your kids on track with their education. In the post-COVID-19 age, virtual academic support is the most likely to stick. Evoke learning specializes in math, science tutoring. You can make use of their virtual service to improve your kids' academic level.
Along with the learning programs, creative classes like art or music are good for kids with special interests.
Ultimately you know your kid's interests well. So make him happy always but at the same time be structured and well supervised.