If you compare to Monero, you see that Monero isn't even allowed on these exchanges. So, it seems that you can't really have privacy combined with high exchange liquidity.
Automated exchanges like Uniswap have Monero.
edit: Uniswap has Wrapped Monero, not actual Monero.
Wrapped tokens are facilitated through a bridge. The bridge contract(s) lock the tokens on one blockchain, and re-issue wrapped tokens on a second blockchain. At a 1:1 peg.
That way the wrapped tokens can be used in Defi or Dapps on the second blockchain, and later (if desired) sent back through the bridge to be “unwrapped” into their original form, on the original blockchain.