She was not in reality a Theravada Bhikkhuni . The ordination was by a Korean order.
From her bio:
There were the ordaining masters, both Bhikkus and Bhikkunis, of
the Korean Sangha and an interpreter to translate from Korean to the English language. It was my sacred duty to translate the ongoing procedure from English to Sinhala for the other nuns seeking ordination. The ceremony took eight hours and the discipline and formality was austere. My knees ached by bleeding and kneeling. I can see the scars even now as a reminder of this most auspicious day
.
First, we took ordination from Bhikkhunis and the second ordination from Bhikkus as was the tradition from the time of the Buddha. We were dressed in ceremonial Korean robes and it was a magnificent sight
The bhikkhuni order has died out and cannot be revived. Misinformed or reckless people may believe that the Garuka Dhammas as laid down by the Buddha are only technicalities that can be ignored but this is an ill idea.
see this thread