A good break down of the other polls done by Yougov on this subject by youtuber Phil Moorhouse.
My personal opinion is that Labour do not want to talk about Brexit until they can stop the Tory media telling lies on the subject. We will only get one shot at reversing this fiasco, so they want to get it right. With Labour I agree on this. Let it lie until we can have some actual facts on the matter. Any discussions with current media throwing in their bias is swayed by those who have pocketed billions from the Misery imposed over Brexit.
Project fear, or where it refers to the supposed remainders in the Tory party is also lies. They were all in on it, suppressing reports on how bad it would be and trying to avoid EU tax regulations.
Cameron, May, all of them wanted it. It was a proper The Sting level big con. They are the slippiest of cunts. This isn’t a bad article
https://medium.com/the-jist/was-eu-tax-evasion-regulation-the-reason-for-the-brexit-referendum-980ba88a8077