I want to replace my first and last name (Directory Theme V10)

Hello.
This time is a directory theme question.

I found out how to swap first and last names on the user’s sign-up form.
ajax-modal-register.php
In
input type = “text” name = “last_name”
input type = “text” name = “first_name”
I was able to change the order of my first and last name on the sign-up form by replacing.

But there are still problems.
My account page
Administrator user page
I haven’t checked everything, so there may be others.

Can you tell me how to change these all at once?

Nice to meet you.