I just checked and there's 4 levels of data speed (including USB 4 Gen 4) and 3 levels of power (up to 240 W) but I wouldn't be surprised if that is an outdated answer.
As I understand it the codec used in Bluetooth headsets is from 2003 and doesn't use the bit rate effectively compared to a newer codec. Sometimes a device will support a newer codec especially with the aptX branding, and even rarer will both devices support it!
Yeah, from what I remember they have a funky iCloud file share thing set up for the whole company, and it requires them to either sign in with their personal iCloud account, or carry two iPhones (one for personal, one for work). Most employees understandably opt for the first option.