I think it’s fine! Let him sleep through! You can feed him when he wakes up. My LO sleeps through the night think around 3 months onwards. But he still wants milk at night. He will start fidgeting then I’ll make his milk and he’ll drink with his eyes close and continue sleeping. If he doesn’t fidget, then I’ll just let him sleep through.
Thats alright since he is 7month old already. Your lucky his a good sleeper.