Obviously an n=1 example, but Ive got a Chinese fitness tracker, a Xiaomi Mi Band 4. I had the Mi Band 2 and this is a significant upgrade. It matches a Fitbit for pretty much everything and retails at £35.
It is a quality bit of kit, not tacky or cheap in the least.
I got it on Amazon 2 days after release. There were plenty of China based suppliers with a 10 day delivery time, but I found one that was on Prime for a couple of pounds extra.
Clearly they had managed to get some delivered and warehoused here in time for release, and as a customer I was willing to pay a nominal amount to get it sooner than otherwise available (and honestly at 2 weeks its not bad really).
Im aware there are things that take forever to arrive from China, but its not really a universal truth. And I do think were there a greater emphasis on the UK buying from China then those routes would speed up some as well.