Almighty Push!
The method Uchiha Yue used to destroy Konoha was actually Almighty Push—the very technique that Nagato Uzumaki, who possessed the Rinnegan in the original story, had used to destroy Konoha...
As for why Uchiha Yue could wield the Rinnegan's abilities and unleash Almighty Push, it began with the evolution of his Purple Eye.
The Purple Eye's repeated evolutions had gradually allowed Uchiha Yue to grasp the Rinnegan's abilities. At the time, however, the Rinnegan abilities he possessed were only weakened versions. The methods Uchiha Yue used to restore his eye power, read others' memories, enter their mental spaces, and absorb their chakra were all weakened versions of Rinnegan abilities, powers granted to him by his Purple Eye.
Having already realized that the Purple Eye could help him obtain the Rinnegan's power, Uchiha Yue naturally devoted himself to training its use, striving to master the Six Paths abilities of the Rinnegan as perfectly as possible. Unfortunately, no matter how he trained, even to the point of excessively draining the Purple Eye's power, he could not perfectly master those weakened Rinnegan abilities.
At that time, Uchiha Yue could only wield three of the Purple Eye's abilities—the three weakened Rinnegan abilities.
But after Uchiha Yue mastered Sage Mode, things became different!
At this moment, Uchiha Yue's Sage Mode was practically equivalent to a perfect Sage Mode; he merely needed time to absorb natural energy before using it. Perhaps his Sage Mode could only last for a brief ten minutes, but during those ten minutes, the Purple Eye's abilities were greatly enhanced by Sage Mode, allowing Uchiha Yue to effectively master the Rinnegan's power perfectly!
Just like now, Uchiha Yue's eyes were six-tomoe Eternal Mangekyou Sharingan, while the Purple Eye between his brows had taken on the appearance of a Rinnegan!
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