I’m guessing you don’t mean “film better than T2 that also happens to be a sequel,” but rather “sequel that is better than the first film by an amount greater than T2 was over T1.”
I haven’t seen T1 in a while, so I’m not sure how it would hold up. I want to say it was like a 7/10? And T2 a 10/10?
So, is there a sequel that is more than 3/10 better than the first film?
Inside Out and Bladerunner are both better than 7/10 in the first place, thus their sequels cannot be the answer regardless of how you would rate them.
I’ve never seen the Twilight films, but wasn’t the 2nd one said to be a huge upgrade over the 1st?
Same with Shrek. I never made it through the 1st one, it was so bad.
Being in a 1st world country