Why hasn't Obito used other Rinnegan abilities? And Could he use them if he wants?

[Shinju Jinchuuriki]

Maintaining the Six Paths technique on jinchūriki was taxing on his reserves. He simply couldn't use more techniques though I'm positive he knew how since he seemed to know all about the Rinnegan.

I sorta believe he could of, but he was more focused on using the Truth-Seeking Ball.

 

[Angelic.]

Obito admitted to not being able to control the Rinnegan completely. Another thing people forget is he has half a body made out of Hashirama cells/Zetsu. Nobody else took notice or remember Madara telling Obito he couldn't be a Shinobi any more. Almost all his moves where either dojutsu or low level ninjutsu combined with his kamui for added effect. Being able to use path abilities required the manipulation of large amounts of chakra in which Obito couldn't do. As for why he didn't use any Mangekyo abilities after obtaining two, he was double dying, bijuu extraction x 11, forcing Kamui trying to keep up with Kaguya and find Sasuke, he had no time or chakra.

bruuuh no.

Cuz obito need 2 rinnegan to use that ablities obito said that he could not control its enormous amount of chakra

no he didnt need two eyes. hed be stronger but no need.