Just wanted to say that the Petronas Twin Towers in Kuala Lumpur (Malaysia) are wheelchair accessible.
To get to the entrance area you normally need the escalator, but staff can help you use a staff-only elevator if needed. You must have your baggage checked. If you have a bigger bag they may try to make you check it because the elevator can get crowded.
After that you get assigned to a group that goes together at a set time. Staff will let you board first. You first go to the bridge, then up to the top. the elevators get gradually smaller. Some of them also have a bump where the floor doesn’t line up directly, so be a bit careful.