Not automatically. For landscape photography, dynamic range is important, and some Nikon models have had a measurable advantage over comparable Canon bodies. If you’re starting from scratch and comparing specific cameras, that can be a valid reason to look closely at Nikon options.

But it usually doesn’t make sense to choose or switch brands based on one spec alone. The differences are model-dependent, not true of every Nikon vs. every Canon body, and both systems are capable of excellent landscape results. Full frame vs. APS-C may matter more than brand in many cases.

Also, landscapes often exceed the dynamic range of any single exposure, which is why many photographers use techniques like HDR or exposure blending. Those methods can reduce the importance of small sensor DR differences.

Best approach: compare the exact bodies you’re considering, along with lenses and handling. If all else is equal and landscape DR is your top priority, a Nikon body with stronger DR may be the better fit. But Canon is still a perfectly good choice for landscape work.