Yes, your link appears underlined when I switch to the Black Ajah theme, and that's enough for me personally to differentiate. The "best practice" is technically also making it a distinctly different color (I think there's a minor difference currently) to further differentiate it from regular...
Instead of starting a new thread, I'll put an adjacent topic here.
The default link format is not accessible. Hyperlinks should be underlined and a distinct color to indicate what they are. This is what they look like right now:
https://www.wikipedia.org
When integrated into normal text like...