Here's the research paper proving the coinjoin protocol turns your coins completely anonymous: https://eprint.iacr.org/2021/206.pdf

Here's the open source code implementing that protocol that you can verify yourself: https://github.com/WalletWasabi/WalletWasabi

I don't know how to write code, my only pull request to Wasabi simply adds a single line of text to warn users not to forget their passwords: https://github.com/WalletWasabi/WalletWasabi/pull/12207