Algorithm choice when generating keys?

[icemanreddy]

Is it possible to choose different algorithms while generating the keys ?
Is "ecdsa-sha2-nistp256" considered secure ?I have seen online content which labels this algorithm insecure

Ref:
https://www.smartftp.com/en-us/support/kb/2725
https://materials.rangeforce.com/tutorial/2020/02/13/SSH-Audit/#:~:text=For%20example%2C%20the%20ecdsa%2Dsha2,SafeCurves%20website%20for%20more%20information.