Public Chat Regex Format

[BigBoooty]

Hey! Been playing around with configs and bots for a while, and finally found a need to be able to identify Public Chat format, but im struggling to get the right regex, especially as the server uses custom textures, the username could have a title infront of it, and potentially an icon as well!
Example of formatting-
https://prnt.sc/Qtk2J1SVV93S

Appreciate any help for getting this regex right! Thanks :)