When i did
 

❯ ssh -p 2020 -o HostKeyAlgorithms=-ssh-rsa Dev@192.168.0.1

Unable to negotiate with 192.168.0.1 port 2020: no matching host key type found. Their offer: ssh-rsa

~

❯ nc 192.168.0.1 2020

SSH-2.0-dropbear

,? ???P??2*4?mcurve25519-sha256@libssh.org,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1,kexguess2@matt.ucc.asn.aussh-rsaaes128-ctr,aes256-ctraes128-ctr,aes256-ctr hmac-sha1,hmac-sha2-256,hmac-md5 hmac-sha1,hmac-sha2-256,hmac-md5nonenone??{?Jq9

I was a little curious as to what kind of dropbear version the router is running.

Perhaps it needs to be updated?