I’ve done that long ago. In fact on iOS it’s simpler: since Apple doesn’t allow third party browsers to use the JIT, using any browser other than Safari will disable the JIT.
It still uses a WKWebView today, even in the EU, despite Apple now allowing alternative browser engines in the EU as of 2 years ago.
I'm sure Chrome will eventually ship Blink+V8 in the EU. It will take some time