The water in our toilet flush does not rise about the 20% mark.
More pics and videos: https://photos.app.goo.gl/xcuJ2dKajRQdbZ938
I figured out that the red rubber gasket doesn't stay in place. If I move the red gasket to its place and apply downwards pressure with my bards, the water does start to fill up. But as soon as we flush it, the gasket goes out of place as it is loose and isn't tied to anything.
Thanks for reading. Appreciate your help.