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I also googled that not charging problem and found that so many other issues exists, so my case is not something special. For now i'm thinking to grab nano s plus which has no battery at all and I hope to get rid this issue in future.
After buying such a defective device, do you still have confidence in the company that manufactured it? For most people, this would be a sign to look in another direction, but as far as I can see, you are good with electronics, so maybe you need new challenges?
Unfortunately, the issues with Nano X and its battery problems are already well documented both on this forum and social media, especially Reddit. It seems that only the first couple of batches they sold back when the device was relatively new operate as they should or at least as close to how they should. There are complaints with everything that came after.
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I have one that has never had any problems and it is precisely those earlier units that are obviously made of better quality materials, and it seems that they were assembled by workers who knew what they were doing. In fact, the battery life on my device is impressive, because even though I used it very rarely (maybe once a month), I never noticed the battery drain more than 5%.
It amazes me that despite all the bad things that have happened about this company in recent years, people still buy their devices, when there are so many good alternatives available.