What is the lamb an archetype of in blake’s poem “the lamb”?

In "The Lamb," Blake uses the animal to symbolize innocence. The poem centers on the idea that the lamb represents a sense of childlike wonder, and a sense of hope and purity. The cadence of the poem presents itself in a very simplistic and akin to a child, which substantiates the theme of innocence. hope this helps ☺️.

the dictionary definition of ubiquitous is "present, appearing, or found everywhere".