Cannot clone Github Repository as Github Desktop wont recognise it

Question

I've began using Github Desktop and after having had a good look around I went to clone my Github repository. It has an SSH key and when I try to use either the Https url or SSH but with either my Github Desktop just says 'Sorry, I can't find any repository matching https://github.com/stevecallahan/MyProject'. I've tried running Bash with $ ssh -vt git@github.com to test connection and I get the following

OpenSSH_8.9p1, OpenSSL 1.1.1n  15 Mar 2022
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Connecting to github.com [140.82.121.4] port 22.
debug1: Connection established.
debug1: identity file /c/Users/steve/.ssh/id_rsa type 0
debug1: identity file /c/Users/steve/.ssh/id_rsa-cert type -1
debug1: identity file /c/Users/steve/.ssh/id_ecdsa type -1
debug1: identity file /c/Users/steve/.ssh/id_ecdsa-cert type -1
debug1: identity file /c/Users/steve/.ssh/id_ecdsa_sk type -1
debug1: identity file /c/Users/steve/.ssh/id_ecdsa_sk-cert type -1
debug1: identity file /c/Users/steve/.ssh/id_ed25519 type -1
debug1: identity file /c/Users/steve/.ssh/id_ed25519-cert type -1
debug1: identity file /c/Users/steve/.ssh/id_ed25519_sk type -1
debug1: identity file /c/Users/steve/.ssh/id_ed25519_sk-cert type -1
debug1: identity file /c/Users/steve/.ssh/id_xmss type -1
debug1: identity file /c/Users/steve/.ssh/id_xmss-cert type -1
debug1: identity file /c/Users/steve/.ssh/id_dsa type -1
debug1: identity file /c/Users/steve/.ssh/id_dsa-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.9
debug1: Remote protocol version 2.0, remote software version babeld-e301d840
debug1: compat_banner: no match: babeld-e301d840
debug1: Authenticating to github.com:22 as 'git'
debug1: load_hostkeys: fopen /c/Users/steve/.ssh/known_hosts: No such file or directory
debug1: load_hostkeys: fopen /c/Users/steve/.ssh/known_hosts2: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts2: No such file or directory
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ssh-ed25519
debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> 
compression: none
debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> 
compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: SSH2_MSG_KEX_ECDH_REPLY received
debug1: Server host key: ssh-ed25516 S.................COqU
debug1: load_hostkeys: fopen /c/Users/steve/.ssh/known_hosts: No such file or directory
debug1: load_hostkeys: fopen /c/Users/steve/.ssh/known_hosts2: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts2: No such file or directory
debug1: hostkeys_find_by_key_hostfile: hostkeys file /c/Users/steve/.ssh/known_hosts 
does not exist
debug1: hostkeys_find_by_key_hostfile: hostkeys file /c/Users/steve/.ssh/known_hosts2 
does not exist
debug1: hostkeys_find_by_key_hostfile: hostkeys file /etc/ssh/ssh_known_hosts does not 
exist
debug1: hostkeys_find_by_key_hostfile: hostkeys file /etc/ssh/ssh_known_hosts2 does not 
exist
The authenticity of host 'github.com (140.82.121.4)' can't be established.
ED25519 key fingerprint is ...........U.
This key is not known by any other names
Are you sure you want to continue connecting (yes/no/[fingerprint])?

I'm starting to miss command line already but I need to get this working, can anyone help?

Answer 1

You need at least to answer 'yes' in order to register the GitHub fingerprint to your ~/.ssh/known_host file.
Check first its fingerprint matches one of the official ones, which are listed here.

Then you can proceed and check if ssh -Tv git@github.com does return a welcome message (successful authentication) or not.

Hi *****! 
You've successfully authenticated, but GitHub does not provide shell access.