Blixt is a private LND node that supports STC. So yes, you have more privacy using it.

>but I did not find this scenario.

I can't say everything in those guides because I do not want to make "others / bad guys" job too easy. Some parts you have to discover yourself.

If I oppen a private channel with the blixt node... Then nobody knows that I have a private channel and my privacy is good for every scenario? I read your guides but I did not find this scenario.

Aeiou

If you open a public channel and also is not a simple taproot channel, then yes, anybody can see it in a LN nodes / mempool explorer.

I explained all these scenarios in many of my guides.

AskSN

E cash privacy nuances

byzantine

If you open a public channel and also is not a simple taproot channel, then yes, anybody can see it in a LN nodes / mempool explorer.

Options to avoid that?
- use STC (simple taproot channels)
- buy channels from LSP (it can be full outbound or inbound, or mixed)
- open channels with LSPs that offer on-the-fly channels (you open them by paying through LN)
- use decoy LN nodes (private and public)
- use decoy custodial LN accounts, also can be used to move in/out extra liquidity and fund new channels

I explained all these scenarios in many of my guides.