Monero

Hey guys, I am new to the Monero community and wanted to purchase XMR with BTC through cash app on localmonero.co. So my main question is, if I send BTC to an external BTC wallet through cash app, what personal information of mine is leaked to the receiving party? I’ve tried searching for this answer online with no luck. Do they see my $Cashtag, or perhaps a BTC wallet associated with my account, or more? Is it any worse or better than just sending cash through cash app? Should i not even consider purchasing XMR with cash app? Hoping to spark a bit of conversation and learn from yall. Thank you very much!