Switching from oh-my-zsh to bash shell

I install the oh-my-zsh and powerlevel10k theme. but it didn't suit me so I uninstall the oh-my-zsh and remove powerlevel10k theme config files and switch back to bash but now my bash not highlighting the command. not showing the command I used in the past the terminal itself is working fine but the features are not. I'm using gnome environment. and I tried replacing .bashrc it with the backup file but nothing happens. And all of this same goes for root also.

Shell :
Attachment 4779

Not Highlighting Command :
Attachment 4780

Not Showing Previous:
Attachment 4781