It just sounds like TLS tunnel obfuscation as a way to get around ISP blocks. While this can no doubt be a useful feature It's not going to do anything to keep your traffic safe from tracking, and if it does it probably wont work for long once they know what to look for in the netflow data.

Also this is apparently not an open source protocol so afaict it can't really be audited, It runs solely on protons services.

To be clear, when i talk about 'your data' I also mean the metadata you generate on every hop between you and the server you're trying to connect to.