A single broken solder joint on a board sounds like it qualifies.

How many people are neatly snapping their phone into two halves?

As a former cell phone repair tech: Quite a few more than you might think.

First off, multiple pieces requires multiple mendings, it's true. Second, the break doesn't have to actually divide the object in two, otherwise it couldn't fix, say, a rip in the sleeve of a shirt, or a hole left from stabbing through a tent wall. So you repair the phone screens. One crack = 1 break.

You could try to be pedantic and say a dropped phone could arguably have hundreds of little cracks, but the same pedantism applies to any cut in fabric, it's actually hundreds of individually cut threads. There's a point where you have to stop lumping tiny things into one "break", obviously, but that point is when lumping them together creates a break that's more than a foot across.

Fixing phone screens should be valid with mending. Of course, phones are more than just screens, so you might need multiple Mendings to fully fix a phone, but you'll do great at screen repair at a minimum.