Most affected balances sit with exchanges and services, so recovery runs through them:

Withdrawals from an exchange during the affected period (August 26 to September 27). These coins are back in the exchange's wallet on the updated chain. The exchange replays these withdrawals once it reopens.
Deposits to an exchange during the affected period. The team is working directly with each exchange to cover these, so your exchange balance can be credited.
Frozen MEXC accounts. We are working with MEXC to release accounts with no link to invalid transactions as quickly as possible.
Card top-ups and payment services. These are settled directly between the service and the team.
Payments between individuals. These are back with the sender on the updated chain. For cases that cannot be resolved this way, a process for individual users will follow.

What to expect

Each exchange and service checks a month of activity, transaction by transaction, before it reopens. This takes time, and doing it carefully is what prevents balances from being credited to the wrong people or twice. Each exchange announces on its own channels when it is ready.
No action is needed right now. Keep your transaction IDs and records. The team will never DM you first or ask for your seed phrase.