In those places, you need to arrive with two platforms. Let one go towards the switch and the other towards a ceiling that you can still reach.
Oh, I am definitely OK with that.
You can see the “intended” solutions here (but it’s kinda a spoiler): https://youtu.be/Bn0o1hITR1A?si=te0XmEqcKFnEErm2&t=682
However, there are some more efficient ways of doing these things.
Alternatively, if you want to just learn the ideas of “platform resource management”, go back to the Anti-Hub and try to solve The Butterfly Effect (which is the middle exit from there). Once you can solve that one, you probably should be able to solve the ending.