I doubt that very much.
Let's say it happens though.
Labour have had there arses handed to them regularly, the Greens have proven themselves to be petulant teenagers, the Conservatives are, well, the Conservatives and Alba will only be relevant if they can somehow reach an agreement with whoever takes over at the SNP.
If Yousaf does resign, the squabble over what happens next in Scotland will be immense and I don't think Labour has it in them to convince people (who actually have memories) that they've taken Scottish support for granted over the years.