ie If Labour win does that change votes for those who say they despise Tories
I know this wasn't directed specifically at me, but I can answer on behalf of myself, and the committed pro-independence people I know.
Attitudes to this prospect were pretty much explained concisely by the FM yesterday morning. The worst possible scenario is the reprehensible shower in UK government right now, and while a Labour Westminster administration would be preferable to that, it's like asking if you want a shit sandwich or a shit sandwich with chocolate sprinkles.
Labour is still ardently pro-union, and many of their policy approaches that matter to Indi-minded Scots are indistinguishable from the Tories themselves. The Labour party has moved so far away from what they used to be when they genuinely were the party of consensus in Scotland that most Scots just don't recognise them any more, so they don't even carry any sort of romantic 'hark back to the old days' sentiment either. They're a centre/centre right party under Starmer no matter how much they kid on otherwise, and their Scots counterparts are still nothing more than a completely inconsequential branch office.
In short, yes, Labour in Westminster is preferable to Tory, if for no other reason than to be spared the most egregious excesses, and established incompetence of the Tory party, but Labour still offers nothing at all to sate a desire for Independence. It's not even a matter that revolves around that one issue. Labour has made it abundantly clear that they are a hard Brexit party now, and that is also fundamentally at odds with the view of the vast majority of Scots pro-indi voters.
I've no doubt that the prospect of Westminster Labour genuinely winning a UK election would entice a few more Scots to vote that way to hurry it along, we see that already in elections in Scotland with the unionist vote flopping either labour/conservative (baffling, but there you go) where there is a chance to stop a pro-indi party, but the idea that Labour in government in westminster would lead to a Labour resurgence in Scotland is wishful thinking. It was Labour in governance in Westminster that finally woke Scots up to the fact that it doesn't make the blindest bit of difference who is governing from there, Labour or Tory, they are still first and foremost a party entirely preoccupied and concerned with England, they have to be for the sake of electability, hence why that traditional vote completely collapsed and the SNP stepped into the void.