How flexible is Upenn?

I was wondering how flexible is UPenn. If I am admitted there in the college of arts and sciences, can I transfer into the college of engineering later if I want to? I am asking this because I am not 100% sure if I want to study bioengineering or chemistry, so I want to go to a school that is flexible. Do any Penn alums or students know?

Start wth what the college does say.
https://ugrad.seas.upenn.edu/student-handbook/undergraduate-policies/transfer-in-to-penn-engineering/