Made for iPhone is just a branding term. It doesn’t imply specific technology other than being something “special” that you get when you use MFi hearing aids. Apple is still into using that term. Here’s a link to an Apple support page updated as of 9/15/22 on which Apple is still throwing the MFi hearing aid moniker around. Even if the underlying basis were to become the BT LEA/LC3 codec, I’d bet that Apple will try to find something in connectivity that you can only get using MFi HA’s with an iPhone - it’s their basic walled garden approach.
About Hearing Aid Compatibility (HAC) requirements for iPhone - Apple Support
While looking for the most recent Apple page touting MFi, I found the following discussion of an Apple patent application that seems to be adding environmental program switching into the basic MFi connectivity features. I wonder how Apple being in charge of what program, directionality, noise features, etc., are activated will go over with ReSound, Oticon, Starkey, etc., ??? Perhaps if they ever implement that sort of feature for MFi HA’s, the HA OEM will have an option to override the basic Hearing Devices settings?
Apple Developing Advanced Features for MFi Hearing Aids - The Mac Observer
BTW, if you can find anywhere on Bluetooth.com that the iPhone 14 is BT LE Audio certified, folks in the BT LE Audio and The Future of Hearing thread on this forum would probably love you posting a link to such a certification/announcement as one of the conundrums is why Apple hasn’t publicly trumpeted anything about BT LE Audio and the iPhone 14. Folks like me who bought an iPhone 14 with that expectation would love to see something definite on that score.