The article includes many antecdotes from the people trying doing the hiring with fewer insights directly from the people in the labour pool. These discussions about businesses having a hard time filling vacancies rarely include the point of view from the people that would fill those positions. The pressures they face include child care during covid, risks associated with covid, and that goes on top of the high incidence of harassment and wage theft they have to face in the best of times. Also, they now have to deal with physical assault from customers who lack the basic decency to follow the simplest of hygiene practices.
This has been quite widely reported and discussed in the UK.
As far as I can understand it, among the problems faced by the British hospitality industry (and, I would imagine, by similar industries in other countries, though in different ways) are that people working in them have had to find other work during our lockdowns, be it in supermarkets, or for Amazon or Uber, or agency work from home, and don't, as yet, see any pressing reasons to return to food service, which for many people is but one low-paid job among many.
Britain has been particularly affected, it seems, because a great many people working in the hospitality industry here were from abroad, particularly the EU, and have spent the pandemic back home with family.
Now either they can't yet return to work here, even if they want to, because of travel restrictions ( Brexit wouldn't affect their returning to jobs here) and, even if they can, they're finding plenty of vacancies locally, since cafes and restaurants everywhere are affected, and are thinking, why go all the way to London to be a barista or work in an hotel, when you can do that back in Madrid or Paris?