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.
If only they were warned about the consequences… oh right, “project fear.”
The UK had a privileged place in the EU before they blew it up over, as best I can tell, fear of foreigners, (which is curious given that immigration is now at record levels.) It’s not often that one gets to see a world power commit suicide over irrational xenophobia.