@YusufHasan what type of "blockage" are you talking about? Do you mean AgCN covalent bond is somehow stronger? Ι think it is because of π electron interaction which caused synergic effect similar to —CO ligand. Correct me if I am wrong. Btw thanks for help!

@HarjotDhillon Not a major contributor as Ag+ is a not very electron rich. But yes a similar dpi - pi* interaction similar to CO may take place with Ag and CN as well. Probably would consider Fajan's rule to be more at play here chem.libretexts.org/Courses/Johns_Hopkins_University/…