I found this website: https://iq.opengenus.org/generating-wallet-address-from-private-key/

From the seed:6c2181e3e8a8dd271f8a074117bc4232e7250e371d2db23d9131c6659c4cc4b1, got decoded to b"l!\x81\xe3\xe8\xa8\xdd'\x1f\x8a\x07A\x17\xbcB2\xe7%\x0e7\x1d-\xb2=\x911\xc6e\x9cL\xc4\xb1then he added Ecdsa Algorithm to the above byte and converted the results into string and got this b'\x9eC\xbe\x96l\x9a*1\xd2N\x83"\xaf\x08\xf05\xf0\xb4\x19\xda{\xb9.\xd0Q\x86\xe2kkeg\xa8\xe9"Uv\xf9\xd2\xb0z_j\x91\xbd\\\xf0\xa6\x18\xf7, he now encoded it and voila he got b'9e43be966c9a2a31d24e8322af08f035f0b419da7bb92ed05186e26b6b6567a8e9225576f9d2b07 a5f6a91bd5cf0a618f7b0468b27989d062dc16a971c2038a9 the public key. Question What Ecdsa Algorithm did he or she added to get back the public key?