For dirt roads as you noted, more than enough. I'm 200 lbs on a Giant Roam 1 with the same fork, riding similar terrain, it works perfectly. Never bottoms out, and *never* pogo-sticks.

Remember, it's a trekking fork, intended for rough roads and gravel trails, etc. It's not a mountain bike fork, so is not suited for high-speed downhill with major drops, or jumping.

Used for what it is intended it is a great fork, and 63mm of travel is more than adequate.

That looks like a really nice bike, well equipped. I'd be interested in what it costs...

Cheers
TRJB