You see that a bid happened and the display name attached to it. You do not see who that person is.
What the room sees
The bid list, the amounts, and a display name against each — {name} is winning, and when it closes, who won it. Where there is no name to show it reads A bidder.
So bidding is public in the sense that matters for a live auction: everyone can see the item is being fought over, which is most of why live auctions find a better price than a shelf does.
What nobody sees
Phone numbers, addresses, email. Not to other buyers, and not to the seller until you have bought something — at which point they get what is needed to deliver it and nothing else.
Anyone's maximum bid. If a buyer has set a ceiling and Metzee is bidding on their behalf, the number is invisible to everyone, the seller included. That is deliberate: a visible ceiling is a ceiling people bid up to.
Pre-bids, before the auction opens. A buyer sees how many pre-bids exist and whether theirs is on top — never an amount. The seller does not see the amounts either, until it opens.
What the seller sees that you do not
The seller sees their own auction's bid history and, after a sale, your delivery details. They do not see your maximum, your payment method, or anything about your other purchases.
A seller cannot bid on their own item, and neither can anyone on their store's team — a team member bidding on the store they work for is shill bidding, with the reserve price and the other bids in front of them.
Why it is set up this way
Two things have to be true at once: the room needs to see real competition, and a person needs to be able to buy a saree without the internet knowing where they live.
Showing a name and hiding an identity is how both hold. A bid is public, a bidder is not.
More: how bidding works, how to find a seller you trust, what a pre-bid is.