“Support” here probably means “we’re testing jQuery for compatibility on those web browsers” - likely Safari from iOS 16 still runs this version of jQuery just

“Support” here probably means “we’re testing jQuery for compatibility on those web browsers” - likely Safari from iOS 16 still runs this version of jQuery just fine. However, running automated test suites or support bugfixing for those clients is a lot harder than spinning up some Microsoft-provided VM with IE11 on it.