On the topic of Krayt Dragons. The EU had a distinction between the two types of Krayt Dragon long before it was retired.

There are Canyon Krayt Dragons. They’re the typical depiction you’d expect to see in various EU media. They’re described as:

The canyon krayt was a common species of krayt dragon that lived in the rocky caves and canyons of Tatooine’s desert ranges. More often than not, the term “krayt dragon” referred to this lifeform. Patterns of horns and spikes appears to have varied from individual to individual.

Compared with the Greater Krayt Dragon. That are based on the Krayt Dragon skeleton we actually see in SW77. They’re described as:

The greater krayt was a rarer, larger species of krayt dragon, known for its tremendous size and continual growth over time. Creatures of near legendary status, greater krayt dragons had ten legs, measured at least 100 meters from snout to tail tip and had the ability to move through or on Tatooine’s desert sand.

If I had to pick, I’d say what we saw in Mandalorian was a Greater Krayt.