Stratum has a feature known as User Links that is available in Admin that allows for creating links to other apps. You could create a link to a news page for example or a link to a Stratum Dashboard, or even a Power BI dashboard. These links appear in the View Groups listed down the left side of Stratum.
You’ll need to have access to the Admin group to create User Links. If you don’t have it you should be able to get access to it from your Stratum Admin. (Stratum Admins – if you allow Advanced users to Admin they do NOT get access to all the Admin functions – only those that are for maintaining user based stuff, not configuration stuff in Stratum – you can find the list of things they would get access to here. )