The instructions have moved from the chat to a separate section. It currently has eight parts: getting started, connecting Garmin, Apple Watch and iPhone, how plans are built, the coach in Telegram, the mini app, nutrition and weight, subscription and payment.
The main difference from a regular help section is that the coach in the chat answers based on the same texts. If you ask "why didn't my workout sync" right in the dialogue, it will find the relevant part of the instructions and explain it in its own words instead of sending you to look for it yourself.
What this gives you: you don't have to remember where each setting is, and you don't have to leave the chat to find out. The whole section is on the help page, and it's easier to start with "Getting started".