Is there any decentralized mixer? It is not always easy to hide identity when doing btc transactions and direct p2p mixers would facilitate that.
I think the closest you can get currently for BTC would be through Wasabi, as described here:
[Guide] Decent mixing methods. It is a wallet, but it allows you to cloak your transactions amongst 50 other TX emitting candidates.
Wasabi BTC addresses though is based on Bench32, and those still have adaption lags as can be seen here:
https://en.bitcoin.it/wiki/Bech32_adoption.