Another bug https://bugs.webkit.org/show_bug.cgi?id=238291 covers imports of Wasm modules into JS module Worker scripts, which is half of the support needed in workers. This bug is for allowing a Wasm module script to be launched from Worker.new (when the experimental ESM integration flag is enabled).
<rdar://problem/90799794>
Pull request: https://github.com/WebKit/WebKit/pull/750