But it will soon be once the EU DMA changes require support for alternative browser engines. Was this change an attempt to lock down too wide permissions a JIT might set up and perhaps really intended for iOS instead of macOS?
Unless I missed something and the DMA requirement is along the lines of "having to allow other browser engines as long as they don't bring their own JITting Javascript engine", no, it literally can't.
And you know, you’re one web search away from finding the page where Apple directly mentions access to a JIT for alternative browsers: https://developer.apple.com/support/alternative-browser-engi...