Can you fly with the Rinnegan?

No, at least not pior of achieving Six Paths Senjutsu. Canonically, the Rinnegan alone doesn’t grant you the ability to fly or levitate.

Why didn’t Sasuke awaken both Rinnegan?

Sasuke didn’t acquire Rinnegan because of Hashirama’s cells. You need Ashura’s chakra and Indra’s chakra to create Hagoromo’s chakra which will transform Sharingan to Rinnegan.

Which susanoo can fly?

While not as big as Madara’s, Sasuke’s Perfect Susanoo has an unique ability. It can, as shown by its two massive wings, fly.

Does Sasuke have the Rinnegan?

Using the power of the King of Hell, a Rinnegan user can overcome any damage that has been dealt to them and recover within a matter of seconds. While it is true that Sasuke doesn’t have the Rinnegan to access its powers, characters like Madara have been seen using its abilities without even having the eye.

How did Boruto lose his Rinnegan?

Just as everything appeared to be done, Momoshiki Otsutsuki took control of Boruto’s body, took Sasuke by surprise, and stabbed his eye with a kunai. Considering the fact that it was Momoshiki who attacked Sasuke, the shinobi losing his Rinnegan makes a lot of sense.

Why can’t you fly with the Rinnegan?

Because the Rinnegan doesn’t grant someone such a ability, at least in canon. The Rinnegan alone doesn’t grant you the ability to fly or levitate, hovering shortly in one location is the closest thing it came to it, I guess. And that was when Pain used the Shinra Tensei against Konoha.

How did Sasuke get his Mangekyo Sharingan?

After the death of Itachi Uchiha, Sasuke managed to awaken the power of the Mangekyo Sharingan in both his eyes. While his left eye evolved into a Rinnegan later, his right eye remained the same and he still has access to its powers. With this eye, Sasuke can observe and see much more than a regular Sharingan, making him much stronger than before.