Understood, and absolutely hardware failures are common. Working in IT, I see them every day. It has been my experience that with iPhones, it is much more common for the speakers to become muffled from dust and debris than outright failure, but I have definitely seen both. I also have an 11 Pro Max that has been my daily driver since launch, it’s a solid phone, I just hate to see people give up on these units if it’s truly just a simple fix as cleaning. Yours is more complicated of an issue, and it’s good that you already tried the known solutions. Four years is great, I hope to squeeze more.

You realize all of these speaker issues can be solved by just cleaning the damn speakers out with alcohol and a brush, right?