Hey @Clo68! Ah, it looks like that template doesn't currently support adding text above where that coloured accent ends, unfortunately (I'm assuming that's where you mean). But I just tested it and if you put your cursor at the beginning of where it says 'Digital Wellness' in your screenshot, then click the plus sign menu > HTML block, it inserts it above the title, allowing you to add the link there (it's still to the left of the coloured accent, but still wanted to mention it just in case).
That said, please feel free to file this as a feature request here53 — we always appreciate the feedback :)
(Also as an aside, if you're comfortable working with HTML/CSS, you might prefer working with our HTML template editor68 for more fine-grain control over the design. We also provide some default HTML templates here59 to use as a starting point — so you don't have to code it from scratch, and can just make modifications to ours instead — in case that helps!)
