The concept of hyperfocus in ADHD was introduced in certain literature to explain a reduced ability of certain ADHD patients to control their attention, such as having difficulty stopping playing a video game to do the dishes. However, that's ambiguously close to normal human behavior of preferring to do fun tasks more than un-fun tasks, so the distinction is best left to professionals.

Regardless, it wouldn't really apply to the OP's description anyway, as accomplishing necessary work tasks before deadlines when necessary isn't the same as someone drawn to fun activities like video games or TV.

As always, it's best to consult professionals. Internet medical advice, especially about ADHD, is increasingly wrong online. It's also worth noting that the concept of "hyperfocus" doesn't even appear in most accepted definitions of ADHD, and isn't considered in diagnostic tests. The idea of "hyperfocus" in ADHD is relatively limited to a few authors and one recent blurb in some European clinical definitions from 2019.