filezilla sftp timeout problem

I am running wordpress on ubuntu 18 in digitalocean and trying connect using filezilla with sftp protocol.I am using root user with password.The problem is i am always getting following error

Status: Connecting to my_ip...
Response:   fzSftp started, protocol_version=9
Command:    open "root@my_ip" 22
Error:  FATAL ERROR: Network error: Connection timed out
Error:  Could not connect to server

In digitalocean access console i run

sftp root@myip

and get message

connected to my_ip

then run following commands

netstat -plunt | grep 22

output : [https://i.imgur.com/0oubnsS.png]

ss -nlput | grep sshd

output : [https://i.imgur.com/zkKAKzk.png]

ssh -p 22 root@my_ip

output: [https://i.imgur.com/vJ1lLTP.png]

tail -f /var/log/auth.log

output : [https://i.imgur.com/YfpGCn1.png]

ufw status

output: status:inactive

iptables --list

output: [https://i.imgur.com/SCc3VO6.png]

nano /etc/ssh/sshd_config

and find following rules

ForwardX11 yes
passwordAuthentication yes
#PubkeyAuthentication yes
#port 22

I also tried to login using putty but got network error “connection time out”

so how to solve this problem so that i can login using filezilla sftp protocol?