In short, yes you can!
If you have multiple, separate online personas or projects it can make sense to have more than one Ko-fi account.
You will need to use a unique email address to sign up for each Ko-fi account, but you can link to the same PayPal email address.
Your PayPal account can be set once you have created your additional Ko-fi pages.
Go to your Payment Settings and you can enter the same PayPal account details.