Beats have some exceptions for microUSB instead of Lightning.
The iPad is handheld and Lightning. The iPad Pro is not and is USB-C. Yes, you can handhold an iPad Pro, but it’s not designed/targeted for that use case, as the USB-C port indicates.
This battery pack is Lightning because it’s a handheld device and it’s an accessory exclusively for handheld devices. While that may be a disappointment, at least the evidence to date is clear that there’s no point holding out for otherwise: they have never released a handheld USB-C device and are unlikely to here either.
Sorry to be the bearer of bad news, but this comes up every time Apple releases a Lightning accessory and people continue not to realize this strategy is in play. I don’t know if it’s a good strategy or not, but duly noted all the same.
(ps. Apple Watch is not a handheld device, and so of course it’s doesn’t have a Lightning port :)
The keep rolling out new devices like this with Lightning. If they were going to start a transition, this or the AirPods would have been the logical place to begin.
You are confusing Apple users with the whole population. USB-C is ubiquitous and I have seen many new and not so new edvices implementing it, yet I have to lay my hands on a Lightning device, let alone having a Lightning - enabled personal computer.