A few years ago I discovered that you can clip through the floor with pushing blocks, here is a demonstration:

https://twitter.com/delcaMX/status/1387448848814067715

I don't know if this glitch was known before, it might help in some stages but I'm not completely sure.

The way to do it is to push the block as close as possible to the wall, try to hang on the block and Yumi will fall to the floor if the block is close enough to the wall, then just press Jump and she will fall through the floor.

Worth mentioning that you can also clip with Ami, but you need to get the block in position with Yumi first.