Given that the two historical TV shows explore similar themes of religion, identity, and nationality, some people have been wondering if The Last Kingdom and Vikings are connected. Although it has been around for some time, the 2010s saw an increasing interest in the historical fiction genre. Vikings was one of the shows at the heart of this this trend as many people were intrigued by the lore and characters (especially Ragnar and Lagertha). They also couldn't get enough of the engaging blood-filled battle sequences and engaging storylines.
https://screenrant.com/is-last-kingdom-vikings-connected-how-timeline/