Cyano B12 is another name for cyanocobalamin
Peptides by definition contain amino-acid chains typically starting at ~5001,000 Da
However, if you are seeking B12 injections for preventative measures or for increased energy and improved mood, many insurance companies view these as elective or preventative treatments that fall outside of essential health benefits
Your situation differs
A 2019 randomized controlled trial of lipotropic injections (methionine, inositol, choline, B12) versus saline placebo in 120 participants on ad libitum diets found 0.8 kg (1.76 pounds) difference at 12 weeks, not statistically significant (p=0.18) (Karbalay-Doust et al., Journal of Research in Medical Sciences , 2019)
Additionally, the MIC portion of the protocol helps the body increase its normal fat burning amounts during exercise