I have no trouble reading but writing kanji has become a problem. I never need to do it and I can’t remember how to write kanji I have no trouble reading. It’s Japanese people too, to a lesser degree. My own Japanese wife has to pause to remember how to write something every now and then.
I remember one time when a university engineering professor couldn't remember how to write the kanji for "police". He didn't seem embarrassed asking someone else. I don't know if they still do, but they would often demonstrate by writing out the character with their index finger like a pen in the other hand's palm.