If you put some math into a regular old google search it presents you a whole solver with, in this case, 30 <math> tags rendering MathML natively (h/t @dginev)
MathML implementations in browsers has been the tireless work of volunteers and for the last several years @igalia funded by a patchwork of investments, a couple of minor sponsorships, grant, and now exclusively by the collective below & Igalia itself.
Idk web engines: seems worth investing in :)