Use the current in-game prompt as the rule
The creator’s official description says rebirth resets progress and grants bonuses. It does not disclose where the control appears, when it unlocks, what the requirement is, which progress categories reset, or how the bonus is calculated. Read and record the prompt shown in your own session before confirming a reset.
Take a screenshot of the requirement, bonus, and warning if you want to compare later rebirths. Those current details are more useful than an old fixed threshold from another player's session.