Hi there,
Thanks for updating. You can add the below content under Customize > Header > Topbar Content :
<p class="top-content">Some example text</p>
And then add this under Custom > CSS in the Customizer.
.top-content {
float: right:
}
You might need to use different CSS or your own CSS to position this on right correctly. I hope you can do this yourself.
Cheers!