The latest I know about is the "Lightning" connector that's been the standard for iPhones since either the 6 or the 7 - I'd have to look it up to be sure which.
As far as the headphone jack going away, that burned my cookies, too - back when I was still using hardware that needed it. (My old Gen-5 iPod Nano) until aftermarket Bluetooth audio stuff started showing up - Ever since "discovering" the Wal-mart "ONN" branded Bluetooth headsets going for about 6-8 bucks each, depending on the specific model, I've stopped being butt-hurt about it. Something to do with not needing to spend more than 10 bucks for decent-quality (no, not concert hall or audiophile level - and what a complete *WASTE* that level of quality would be, as far as I'm concerned) sound out of a "disposable-priced" wireless device (as opposed to the *INSANELY* overpriced Apple "airpods" that, at least at first, were going for more than 80 bucks a pop) tickles me just as pink as anyone might like.
With my line of work, buying a set of airpods would be APPROXIMATELY the same as setting the cash on fire - I'm *ALWAYS* managing to lose the ONN headsets to something or other, be it bending over to scrub a water tank and having them go swimming (instant, irrevocable death - I have yet to get a set of them that's met that fate back to operational status) or being flung who-knows-where (and/or getting stomped on) due to sudden motions required to keep *ME* from being damaged while handling one of the critters, and so on, my use of headsets REQUIRES that they be cheap and easy to replace. Back in the days of the old iPod I mentioned, that meant settling for the cheapest of cheap junk, which meant loss of a bunch of functionality that I considered important, and even the cheap ones still ran in the $15+ range. Nowdays, I keep a pile of the $7 ONN units on standby charge, and when the set I'm using runs out of battery, plug it in and grab the next one, or if I kill/lose a set... <shrug> So what - there's another one just waiting for me to pull it off the charge cable and turn it on.
Edit for typos...