Double stroller or standing stroller?

Trix

My daughter will be 2.5 when my son is born. Most of the time she prefers to walk but I’m thinking about getting a stroller she can stand on or a double stroller.

Anyone have suggestions either way? Is there an option that would allow her to either sit AND/OR stand? There are so many choices it’s hard to sift through it all with the three minutes of free time I have each day 🤷🏼‍♀️😁