How to add parentheses to a phone number filling a form with my iPhone 11

I was filling a form out on my newly acquired iPhone 11 when I got to the section to fill in my current mobile number it had my old number when i attempted to correct to my new number the parentheses were no longer there. Every time I tried filling and saving hoping the parentheses would return after saving they would not rendering the number invalid without the parentheses around the area code. Only numbers were available for selection nothing for symbols . Does anyone have a solution to this dilemma.