Especially Corbyn, though of course he couldn't "support it" outright because that would mean agreeing with Tories (and he couldn't oppose it outright without angering a lot of Labour members)
Another rewrite of history. He backed Remain.
Very reluctantly, and probably against his own better judgment, at least that was the impression he created.
Did he? Any support he gave was so tepid, I barely noticed.
He made more media appearances than Alan Johnson who was running Labour’s Remain campaign.
Corbyn is a lifelong Eurosceptic who voted against every expansion of EU power that came before him in his entire ~30 year career as an MP pre-2016. He only "opposed" Brexit in 2016 because he had to.