Do you have an iPad Pro? I also got it as a birthday present and everything seems to be working fine. I then watched its characteristics and video review on YouTube and was satisfied with the gift. Also here is a good overview of different tablets
https://woahtech.com/best-tablets-for-taking-handwritten-notes/ , you can find more info about this iPad, too. And it is showed as the best of all the options offered there. Moreover, I think it is the best product on the market among tablets. Anyway, if you've solved your problem, pls tell me about it, probably this information will be useful to me.