Before we were closed down, we[ my operation ] had already disinfected tie - up chains, washed all the bridles with virkon, etc. And, as I only have one staff/rider, he does all the tacking up and riding, and I wash/brush/rug the horses. Easy to keep a good distance apart.
And plenty of handwashing around the stables, but, as there are only the two of us apart from a casual mucking-out person [ who is also a flatmate of mine ] there is really minimal risk.
I can't comment upon the others, though.
As many ride directly from their stables, the need for separate tie up areas is probably not a biggie here; can't comment about the other large centres, though, maybe they have the equipment to which you refer.