Since the Note 9 is curved, glass screen protectors start peeling at the edges sooner. The best option is to use nano screen protectors. Besides, I don’t think there is a need to pay huge amounts for nano screen protectors either. You can find quality products on AliExpress and buy them for a few dollars. There is no need to pay amounts like 100-200 TL to have a screen protector applied, guys.
In short, if you don’t want to experience peeling issues in a short time or touch sensitivity problems, my recommendation is to get a nano screen protector.