regex to capture a character followed by itself or other specific characters in a single group

I am trying to handle a code where comments can be designated with !, !!, or !>.

I want to match all of these possibility in a single group but am having difficulty as whatever I try so far might match the ! in !! or !> etc. as a separate entity.

Example: regex101.com/r/u0vMY6/2

If anyone can help with this that would be great and help me to make progress.

More specifically I want to do this with the overall objective of matching when there are 0 or 2+ spaces after the comment deliniator followed by a word.

I have an summary of what I am trying to achieve here: regex101.com/r/u0vMY6/4

If needed I could perhaps break it down into multiple checks.

I’m not very experienced with regex but have read various cheatsheets and stackoverflow questions without finding a solution yet. Any help is appreciated.