https://help.forumotion.com/t134367-announcement-box-in-chatbox?highlight=chatbox+annoucement

lets remake this for phpbb3 or all version and lets make more customizable since this doesn't work on my forum at all curently

Something like this tutorial ?
https://help.forumotion.com/t136595-add-rules-beneath-the-chatbox#921650

https://i.imgur.com/KGVG1kV.png something more like this

Try this code : https://help.forumotion.com/t139284-codes-to-personalize-your-chatbox#cb-logmsg ( Add a message on login )