First off, I’m simply correcting the OPs statement that there are only two rendering engines out there, Google Blink and Firefox Gecko. You’re “yeah but <reason why you personally don’t like Apple>” doesn’t really have any material impact on these facts, and doesn’t really bring anything constructive to the conversation.
That said, Chrome, Firefox, Edge, and Opera are all available on macOS. All of these are also available on iOS and iPadOS (the EU mandated last year that Apple permit third party rendering engines on iOS; whether or not the versions available to you use WebKit or their own rendering engines likely depends on where you are in the world).
You’re welcome to hate on Apple all you want — but at least have your facts straight when you do.