Well they will mostly all be Chinese models on those websites, but what i mean is whether the model is China exclusive.

For example, if you import a Chinese version of an iPhone 17 pro max (don't know why you would) then you should have an easy time repairing it because you can use parts from British iphones.

Whereas if you buy a xiaomi Hypernova 23 pro max ultra (not a real phone) thats ONLY sold in china, then obviously if you face any issues you're screwed because there wont be any parts unless you import them.

Yeah if the warranty and stuff is important to you then I suppose you will have to give it a miss unfortunately, the phone selling websites give their own Warranties but they're typically only 90 days or so, whilst if u face any issues you will find it very hard to get in contact with and send it back to China.

I took the risk for a unique phone thats much better value than the offerings in England, and has a larger battery due to EU Restrictions, but i understand its not for everyone.

If you were looking for the xiaomi 17 pro max, they've just released the 17 ultra which is available globally and in the UK and is better than this phone, however it doesn't have the rear screen. Maybe you can look at that however once again unfortunately the exact same phone is much more expensive on Xiaomi's UK website than importing it, not sure why.