space has been around for a lot longer than earth, its possible that inter planetary generation of nucleic acids may be primarily a matter of chemistry.

Nucleobase synthesis in interstellar ices[2019]

https://www.nature.com/articles/s41467-019-12404-1?error=ser...

Chemistry of Abiotic Nucleotide Synthesis[2020]

https://pubs.acs.org/doi/10.1021/acs.chemrev.9b00546