As the minimum trading days for a 2-Step Challenge is 5 days for each Phase (with no time limit respectively), that’s why you have to maintain 5 minimum trading days on each Phase even if you reach the profit target earlier.
If you can reach the 8% profit target in your 2-Step Phase 1 within 5 days by complying with all the rules, then you will be eligible for a 2-Step Phase 2 account.
The same thing applies to the 2-Step Phase 2 Challenge as well. If you can reach the 5% profit target in your 2-Step Phase 2 Challenge within 5 days by complying with all the rules, then you will be eligible for a TradersFlow account.