Re: Paramont plus and Discovery Plus was paid on the 1st
to add to renojim's reply:
On the roku channel, see if there is a row that lists Paramount or Discovery (mine is under the 'save' list and above the 'browse premium' rows). You can select from that row or keep scrolling to the right to find the "see all" button to browse the channel. You can search for their specific content on the and see if selecting it acknowledges that you have access.
Also see if Roku added a special 'Paramount/Discovery ON ROKU' channel on your home screen. You can search on that channel too.
I got Paramount in Dec. too and was able to access it through the regular Paramount+ channel until Jan 2, now having issues. These two options still work, though not perfectly.