Possible but there aren't plenty of good alternatives for them. Banking on Rodgers getting the sack soon, Zidane who needs a break (and not sure about Ronaldo's feelings about him) or another interim. ETH and Lopetgui won't leave untill summer.
SAF still has a big sway with the United hierarchy and I think his priority is Poch to replace Ole. They will hold on until Poch is available, unless Ole brings the club to a free fall where there’s little chance of getting top four.