dns
Radgirl is correct and her comment is based on fact, yours is not.
GM crops are a completely different paradigm to a mRNA based vaccine.
The mRNA does not modify the host DNA, in fact it never enters the nucleus of the cell. Rather the mRNA is used by the cell as instructions to replicate an antigen, the spike protein. This antigen is then expressed by the host cell to trigger an immune response. Crucially the mRNA is non-self replicating and it broken down by the cell.
In the case of a GM based crops the plant genome is modified to produce desirable characteristics. The concern from regulatory bodies is that GM based crops can replicate in the field and may displace others in a particular biome.