Apple MFI certifies USB-C cables also, so I'm not sure if it is throttling its iDevices to be finicky with non-MFI USB-C cables.
I know for a fact that Apple did software updates to older iPhones to make them sluggish and drain battery quickly. I realised this when I went to Apple Genius Bar to get my iPhone 7 Plus battery replaced after it started draining too quickly daily, but even with new battery same problem persisted. The friendly staff member unofficially told me it is because of the recent software updates by Apple for older iPhones, and advised not to hold out hope that any future software update will fix the problem. Even a year later, his warning remained true. I gave away the iPhone to my nephew as a backup device for his studies, but he sold it soon, as it was a nightmare to keep charging it frequently.
Apple has faced multiple fines for deliberately slowing down older iPhones without informing users, including a €25 million fine in France and a $41 million fine for deceptive marketing practices. The company admitted to slowing down devices to prevent unexpected shutdowns due to aging batteries, but critics argued it was misleading.
These days, I wouldn't trust Apple with a barge pole, let alone the money from my wallet.
These cases are much less convincing than they may seem if you just take a moment to read about them. iDevices would throttle the cpu to make the battery last longer as it's capacity falls, this kind of throttling is not uncommon and not malicious.
This wasn't misleading, and isn't something that warrants any genuine criticism.
You will not find this quick battery drain problem in Motorola, Nokia, Oppo, Sony, etc. Their phones last several years even with ageing batteries. An 10+ years old Oppo phone I have, still holds almost full charge at idle, throughout the day.
As batteries get older, their capacity to hold charge reduces, but if a phone battery is draining too fast even in idle mode, it is likely due to software, not hardware. And if it is due to software, then the manufacturer company is to blame.
That would either require hurting the battery life on all models or require distinguishable behaviours that only occur on specific models and would be relatively simple to prove through reverse engineering.
Apple has been fined for the throttling, but hasn't ever been credibly accused of actually deliberately taking steps to reduce battery life on older devices.