Add iOS Chrome
Given Apple's restrictions, all iOS browsers are essentially equivalent to Safari, but when it comes to Payment Request support, iOS Chrome supports it, iOS Safari does not.
+1 this.
Apple also place restrictions on ServiceWorkers, choosing to disable them in the Chrome and Firefox Apps so that only Safari supports them on an iPad / iPhone (note: They do not restrict ServiceWorkers in Chrome and Firefox on Apple laptops, only mobile devices).
As the caniuse.com data already makes a distinction between "Chrome" and "Chrome on Android" with separate columns I think it might be sensible to add a "Chrome on iOS" column. Or if not a separate column, at least some kind of caveat or info in the "Known Issues" tab that explains the restriction on iOS devices. Happy to consider how best to communicate the info.

Currently, looking at the Service Workers page (see my screenshot above) you would sensibly conclude that Chrome would support ServiceWorkers on an iPad/iPhone as there is nothing to suggest otherwise. This is inaccurate. (Note: I have recently got into uncomfortable discussions around contractual obligations around support of a site feature in Chrome on iPhone).
I am offering my help and will make a Pull Request if the maintainers approve this idea. I would be a first-time contributor to this repo.
From iOS 14 you can now set Chrome as your default browser, I really do think it should be added to the comparison.
Since iOS 17.4, Chrome (and other browsers) can use other than WebKit in the EU. Hence, I think it's even more relevant now to highlight the difference of platforms for this browser.