I have recently faced an issue during CSV import as below.:

In ‘Categories ‘ column. Category name is like ‘Default Category/Motorola/E Series/Moto E6 (XT2005,XT2005-3,XT2005-5)‘

While I am importing this category, it’s creating three categories despite one. Due to comma(,), Magento’s default functionality considers a new category after comma(,).

It will create categories like :
1) Moto E6 (XT2005
2) XT2005-3
3) XT2005-5)

To fix the comma issue in categories name follow the below solutions :

To fix the issue you can use # code by replacing comma (,) 

- Hash code for ',' is ,  using this code you can replace comma in category name.

For example :

So, by replacing the comma with Html character code, the issue will be fixed and created a category same as expected.

Let me know if this article is helpful to you.