iOS mail client abruptly stopped working with xfinity mail for second or third time this year. No prior or current solution is working.

Per the subject header, the iOS mail client being used is no longer able to access xFinity mail.  This has become an annual issue and is presumed to be the same problem which has been ongoing for years with Comcast/Xfinity and Apple iOS (but not MacOS, apparently) mail clients.

In trying to resolve this most recent dilemma: on the device I have tried (a) re-entering the password, repeatedly even; (b) deleting the specific mail profile for the account and re-adding it as new; and even (c) manually setting up mail types/options; and on the Xfinity platform I have (d) verified "allow third party apps" was activated; I have (e) de- and re-toggled "allow third party apps"; as well as also (f) changing the account password - again (historically, e.g. this year and typically in previous years, doing that has undone whatever conflict there happened to be between systems, but not this time); and I have even reviewed approximately half a dozen threads on this forum about this very issue, some of which rendered as locked by Comcast/xFinity so that it wasn't even possible to click links or copy text otherwise - which is incredibly disconcerting forum behavior (but that's another topic for another thread).

As a client of several decades in a family of clients with, in some cases, around forty years of patronage this is only adding to the list of reasons to dump Comcast/Xfinity which would be a serious inconvenience given the obligations it would impose, yet the lack of concerted effort by the company to address seemingly long-standing, years old, issues while incessantly pumping up prices to absurd amounts (nearly twice what it was just five or so years ago) suggests that is where this will end up; however, in the meantime, does anyone have any ideas about why this is occurring and how to go about resolving it which hasn't already been attempted pursuant of the list above? Or is there no solution because of Comcast/xFinity taking no interest?