Yesterday Igalia sent an Intent To Ship MathML-Core in chromium.   If you’re not familiar with what an intent to ship means - the blink release process involves several stages before something gets to ship. An intent to ship marks the beginning of the final step which allows the feature to just work by default in stable releases.

You can read about the intent and progress on  https://groups.google.com/a/chromium.org/g/blink-dev/c/n4zf_3FWmAA