The tipping point for decline into Brexit supporting will have moved up. The percentage of Leavers under 50 is small. The oldest (wartime) generation is the most pro Brexit and they are the first going out of the door. The 24 and under new voters are 80+% Remain. This all would translate into a Remain win in another Referendum, particularly as also sensible middle -aged voters now know what a disaster Brexit would be.
However, as things stand with a General Election coming first that is a different matter. The polls are showing a big Johnson lead over Corbyn. This may not turn out as the polls suggest however, as with the 2017 election and much depends on the young vote turning out (Corbyn being more popular with them). If there is a November election the Universities will be fully back in action and this could be a factor. Apparently Johnson is not popular with middle aged women because they can see through him. Another factor is the accident proneness of Johnson.
The ideal outcome of the General Election would be a hung Parliament with a tiny Labour + others majority. Then a Referendum would be a certainty.