There are in fact a few episodes of the orally transmitted story of the interaction with the Norse settlers among the Inuits in Greenland, but they were collected relatively late, in the late 19th century, about more than 150 years after the European re-discovery and successive colonization of Greenland by the Danes. The existence of these stories are mentioned in the following previous posts in this subreddit:
Most of the relevant primarily sources are certainly written in Old Norse-Icelandic only extant in later medieval manuscripts (mainly from the 13th and 14th centuries), but the oldest text alluding to Vinland is a late 11th century Latin text written by the German clergy, Adam of Bremen. While even the Yale University (the current holder) has recently admitted that the notorious "Vinland Map" was most likely a 20th century forgery (see this news issued by the university officially dated to this September), another 'newly-found' entry of Late Medieval Genoese chronicle get viral in the media in this summer - apparently the chronicle alludes to Markland (Old Norse place name usually identified with Labrador Peninsula in now Canada), though I still have some doubts on this new primary text.
As for this newly founded Genoese mendicant Galvano Flamma's mention and its alleged accuracy, I also list some recent posts in this subreddit below:
(Edited): fixes typos.