You could do workarounds (listing by what i rank best to worst):
Create a PowerAutomate flow that copies the news page each time a newpage is published and creates the page InfoScreen.aspx. This is the page you always show on the infoscreen. Each time a new news item is created this page is overwritten by the PowerAutomate flow and the info screen will always show your newest news item.
When editing news, change the same page every time. Maybe rename the page in the site pages library so that the newest aricle always has "newest.aspx" filename, and of course the second newest has to be renamed aswell.
Copy pasting news to a page with a static name.
Creating a SPFX web part that pulls content from the page into a seperate news page that is static. (I don't think this is a good solution, dont really know if it is possible atm)
Or you could do more advanced solutions of redirecting to the newest page and somehow forcing your infoscreen to refresh to catch news, but thats a whole other story.