I have done banner changing task and it is failed for app server 1 but i did it correctly


Seems like you changed root password on all apps which is wrong way to perform any task also its a security risk. Hence task was marked as failed.

Please strictly follow the requirements mentioned in the question and never try to change passwords until it is asked in the question specifically.

but the users provided do not have any privileges to do scp copy from Jump server to others
any hint will be useful

you can do with other users too. For example :–
login as a tony in app1 server
scp example.txt steve@ ( if permission issue then make it for others user)
we can do by this as well.