UFW comment existing rule?
If you add exactly same rule, then the existing rule gets overwritten and comment is updated there.
E.g.:
recyber@linux:~$ sudo ufw allow from 10.0.0.0/24 to any port 1234 comment "Comment"
Rule updated
According to ufw man page, there is no way how to edit existing rules in-place.
Here are your options:
A) Delete, and then recreate your rule with comment
B) Use ufw app profiles to define a service, then use description section for your comment.