Your request to https://spacejam.com is redirected to https://www.spacejam.com/ .
Your request to http://www.spacejamanewlegacy.net is redirected to https://www.spacejamanewlegacy.net/ .
You never tried making a request to https://www.spacejam.com/ .
Go to https://reqbin.com/ and enter https://spacejam.com . It gives 1 redirect (to https://www.spacejam.com/ ) then HTML.
I think you missed which servers are connected at the end of which request, there.
Reqbin receives an upgrade request to HTTP2, that it never follows.