I was recently promoted to SDE 2, but somehow my mind is still stuck at SDE 1, How do I start thinking like an SDE 2 ?

Its like shadi ho gyi but single wala feel aa rha, lol😂

Maybe start thinking along the lines of would an SDE2 do this? How would/should an SDE 2 do it?

This should help https://sijinjoseph.netlify.app/programmer-competency-matrix/

Interesting, i thought first you operate on a higher level for some time then only you get promoted, at least that has been in my case with all my promotions.

Fake it until you make it. Since you're already SDE2, now fake as SDE3