iPhone screen frozen on accessory not supported

As part of troubleshooting, were alternate and Apple-quality replacement cables tested?

Usually two+ sets of additional cables can be useful, to test/check for port damages..

..since 'hardware issues' may require portable devices, or installed vehicle hardware

of the aftermarket variety, to go into repair shop(s) for deeper thorough testing..

Genius Bar Reservation and Apple Support Options - Apple

//www.apple.com/retail/geniusbar/

Due to the nature of these things, probable 'service diagnostics' should be looked into.

At some level, those may go beyond an Apple authorized service provider &/or Genius.

Should you need to order replacement cables from Apple online, there are several

adequate exact quality replacements; also OWC macsales has those as well.

There are a few (dozen?) options mentioned from search results

although some, clearly duplicate; through route, all may not be.

If I were to totally diminish value of my offline time to sub-zero

as a Volunteer, I might try a few; and alter search inquiry here:

https://duckduckgo.com/?t=ftsa&q=force+shutdown+iphone+and+restart+command&ia=web

Variables include those off-results with truly novel characteristics.

May change according to your choice of breakfast cereal or juice.