Issue with editing playsms

Hello I’m trying to edit the code on the website and make my own changes I tried checking in themes but still having trouble locating where to edit the actual content of the playsms website page. I’ve managed to find and modify the following:

Main Configuration: I can edit the information area within this section.
CSS: I’ve been able to adjust the CSS styling.

However, I’m unable to locate the area that allows me to edit the text and content of the individual page itself. Would you please provide guidance on where I can access and modify this content?