Still not with you here - when has any of this happened, or appear to be happening?It's obviously figurative not literal. Cast aside. Pushed out. Excluded. Unnecessarily sold off. Etc
There has been speculation that Kelleher might leave, based on his abilities and wanting to be no.1 somewhere - but that would be his choice. As far as I can see the only suggestion that Ali might leave has been media bollocks about him going to Saudi - again his choice.
If Kelleher goes it leaves a gap, and Alisson has been a bit injury prone, so bringing in another experienced keeper makes sense - no-one is being pushed out as far as I can see.