MathML is making a return next month. https://chromestatus.com/roadmap
Yeah, and that's arguably thanks to Igalia and all of their sponsors. They've put a colossal amount of work into this project. If you have the means, it's worth donating for ongoing support, too: https://opencollective.com/mathml-core-support
Google just removed it and would've been content with it staying gone. They said "it wouldn’t have been a good return on investment for us to do it".