Eurostar say leisure travel is back to 100% of pre-pandemic levels & business travel 80-85%. But due to Brexit they can only provide 70% of pre-pandemic capacity. They've plans to resolve this including trialling online check-in, I've added a summary at https://www.seat61.com/news.htm
The Man in Seat 61:  What's new on the site

News page on the Man in Seat 61 website

@seatsixtyone Why don't they just reopen Ebbsfleet and Ashford? If the bottleneck is st Pancras, adding two more stations in the UK would increase how many seats they could sell, Surely?
@quixoticgeek @seatsixtyone Because UK border force can't provide enough staff for that apparently.
@slasherfun @seatsixtyone radical concept I know, but why doesn't UK border force hire some more staff ?
@quixoticgeek @seatsixtyone I guess because the British government hasn't increased (enough) border force budget for that.