I had the Graco Room For 2 that someone linked below and I found it very useful for about a year, maybe a year and a half. My son was almost 5 by the time my daughter was born (they are now 10 and 5 so this is going back a few years).
This particular one is much cheaper than some of the others (link below says 108, I think I got it on sale for less than 100), and I thought it was totally worth it for the price. Some of the more expensive ones let you fit the car seat in either seat, etc. but I didn’t need that. This one did fit the car seat in the front, although that did impact the sitting portion of the back. It wasn’t a big deal - the older one just had to lean forward a little if he was sitting, or he could stand.
I’m a stay at home Mom and was often out and about with both kids by myself so having a stroller that fit them both was great for containment. I also used to take a stroller fit class and used it for that. It was slightly harder to maneuver than a single stroller but not terrible. I was able to run with it,
My son was old enough that I didn’t need a regular double stroller and he certainly could walk a lot of the time but on a long day out and about, trips to amusement parks, zoos, etc. it was great that he could just hop on and ride, either sitting or standing. There were even times when his cousin was with us (she’s just a few months older than him) that they both stood on the back and rode at the same time (your daughter could probably have the middle 2 both ride if needed).
All that said... I still also used a single stroller on shorter trips or if I was out with the baby while my son was in school, etc. And as I stated above the I mostly used the Sit n Stand the first year when my son was 4/5. It was maybe used for a few big trips just after he was 6, but then I passed it on to a friend.