“As Michael Garcia, the lawyer responsible for the report is a US citizen, a partner within Kirkland Ellis LLP and bound by US and New York State law ... can a freedom of information request to get a copy of the report be made?”
Wouldn't have thought so. It was a report commissioned by a third party (FIFA) of either him or his firm, and would have all sorts of confidentiality clauses built into it. If we could get this report, why not a copy of Scarlett Johansson's last film contract, or a copy of Apple's contract with a semiconductor fab, or ... well, anything really...?