Are tourist or family visit visas now difficult to obtain for ethnically Han Chinese people?

I recently came upon a social media post from someone who was having difficulty getting a tourist visa for China because she was ethnically Han Chinese.

Other commentators said it has become difficult as well.

https://www.threads.net/@eatingalonediaries/post/DFDGB4fpFf5?xmt=AQGzWQkfUVrnkSepWFxq0SUWFFrhNIZJ8yKjITW5m55SeQ

Basically she was at the China Visa Application Office in Hong Kong and had to prove that she was no longer a citizen of China. Despite giving the immigration officer her USA Passport, parents' USA passports, and even a birth certificate, it still wasn't enough to prove that she wasn't still a Chinese citizen because of her Han Chinese heritage.

The commentators on her post said that a lot of immigration nowadays looks on ethnicity to determine visa eligibility.

Has there been a recent policy change for Han Chinese people applying for Chinese visas?