Whilst watching a stream last night, someone came in to chat asking if there were graphics available for using to display on stream and track ships sunk.
I wasn't able to find graphics, however I did find this tool that has a Twitch overlay - https://www.sotshiplog.com/
Can't remember the TTV username of the person who asked, but hopefully they see this and it helps them and others out!
Disclaimer: I've not tried this tool, and am not associated with it in any way. Use at own risk etc etc.