Is it possible to add "sub titles" to the package headers

In Pro Sites, under the Level Names.. https://nimbus.everhelper.me/client/notes/share/784885/g0yn1tn5ceu1urlqt2tm
In the input boxes.. I tried to add
Test to see if I could do some styling in the input boxes to add subtitles or even descriptions in the header boxes.. but the input boxes immediately rejected any styling..https://i.imgur.com/gQO3ObV.png Can this be changed? say add
<span>?? or what if I wanted to add a link, "see list of features" in each box on the pricing table.. ?? since I am not using the feature design?
And also.. do you have shortcode buttons for each level.. say level="l1m" for level1 monthly.. and then I could build my own pricing tables and just use your shortcode buttons.. this would offer alot of flexibility considering your setup is designed around a "left" features layout. Thanks.. I am still deciding if this is what I want, and if its going to work for us.. and if its flexible enough. Thanks again.