How do i display the guest list chronologically with ranking in decimal when i click "See who R

Hi, thanks for getting back to me this quickly.

Currently, when i press "See who rsvped", it will display the list like this:

? username
? username
? username
? username
? etc.

What i would like to achieve is that the list to display like this:

1. username
2. username
3. username
4. username

In chronological order based on their sign up time. Could this be done? Thanks in advance for your reply

I tried
*adding line-style: decimal


      *adding !important

      None of it worked