you can use CoinJoin-supporting non-custodial wallets or download Bisq and swap your bitcoin to Monero or use ---> https://exch.cx/
It is true that mixing services have been banned here, but there are other ways to enhance your privacy, especially since some mixing addresses have been banned by OFAC.

It depends on the service, they are banned here so the chance of them scamming you is greater but if you trust them then it is up to you.