Norse may have been there, but there was no lasting impact. No permanent settlement, no trade, no records other than logs/journals, no memory, no further exploration …. Compare that with the impact of Columbus’ voyage

We actually don’t know how much the Norse may have explored: we have very few records and I believe only one settlement for a couple years.

I find this idea fascinating - they could have ….

— https://www.atlasobscura.com/places/norumbega-tower