I was wondering for some time now, how analytics software such as chain analysis or whale alert find out which wallets belong to an exchange. I was trying to find the answer but I was not fully content with what I found so I try here, where I am sure the subject matter experts can explain this to me and maybe other members of the community who care.

First, I know the easy approach of withdrawing from an exchange like Kraken and then they can obviousely see from where the funds were sent. That's easy.
That gives them in most cases 1 to N addresses that recently have been used by that exchange.

Second, they could then find all addresses ever used in combination with the ones used for the initial withdraw (as input) and like that find surely plenty of addresses and transactions that can be allocated to that particular exchange.

BUT is that enough? Is that all they do?

I doubt exchanges share their deposit addresses and withdraw addresses with those service providers even if just anonymous??

Same goes for the fact that some (e.g. Binance) started to ban deposits coming from an address that used a mixer. How would Binance know its a mixer?

If I posted this in the wrong section, I am sorry but I did not know where else to post as its kind of technical