Hmm, from what I understand, the mRNA vaccine of Pfizer-BioNTech and Moderna instruct the cells to make the full-length spike protein though.

E.g., this paper (https://www.mdpi.com/2076-393X/9/1/36/htm) states, "...that BNT162b2 [Pfizer's one] and many other COVID-19 vaccines [including Moderna's] express the full-length spike protein."