Can Naruto destroy a continent? *Discussion

No, and even with clones it’d take him quite some time.

R1: With a Single Tailed Beast Ball Explosion? Maybe with a significant part of his Chakra.
R2: Throwing 9 Tailed Beast Ball Rasenshurien and having them explode? I can see it.

Tailed Beast Balls don't really scale with their Chakra Volume level. They're so destructive because the ratios of Chakra used to create the spheres of Chakra makes them extremely volatile. So I can only see it with the use of Tailed Beast Balls.

yes

Since the Pain Arc

Since birth

Yeah, and defeat, Unworthy Thor, Hercules, Red Hulk, Supergirl!