For the longest time (maybe still true) NIST would not certify Secp256k1.
That's a feature, not a bug. nostr:note1h7s99v40xayw5us2p8hwclrl3ht06whu97vgfmmgyfvgx2kn62msdfe3pz
Discussion
As far as I know, secp256k1 is a standardized curve, but the rest of the standards that build upon ECC use secp256r1. I'm not an expert.
whoa 😳