There’s not really any arguing with four polls in four months, all with 1 000 plus samples, and all with support at 50% or above.
Second vote support was at 45%.
Westminster support was at 51%.
The increase in the last one seems likely to owe something to the assured performance of the First Minister in covid briefings.
There were early signs of widespread approval for her at the end of March: https://talkingupscotlandtwo.com/2020/03/31/approval-for-nicola-sturgeon-high-among-snp-lib-dem-and-labour-voters/
We can probably see the same effect in the Survation poll yesterday putting trust in the Scottish Government at 70% while the UK Government scored 54%.