Massallah pertaining to Nifaas

Assalamu Alaykoum,
Jazak Allah for your prompt answer to question #6890.. After delivery the lady bled from 5th june to 28th june, then again on 9th July to 15th July and 18 July to 21st July.
On 28th june, she had ghusl, performed salaat and tilawat Quran till 9th July.. What is the ruling for the ibadah done during this period since she wasn’t aware she was still in Nifaas? And she cannot remember exactly which part of the Quran was read during that time.