A bar | will allow you to do this. From :help :bar
'|'can be used to separate commands, so you can give multiple commands in one
line. If you want to use'|'in an argument, precede it with'\'.
Example:
:echo "hello" | echo "goodbye"
Output:
hello
goodbye
NB: You may find that your ~/.vimrc doesn’t support mapping |, or \|. In these cases, try using <bar> instead.