Insurance denied ovarian cyst surgery what if cancer is found during surgery?

My mother has a 13 cm ovarian cyst and surgery is planned. The scans currently suggest it is benign.

Our Aditya Birla health policy started on 02/02/2025, and the insurer has denied cashless approval because ovarian cysts/benign tumours have a 2-year waiting period.

My question is: if the cyst is found to be malignant during surgery or on the final biopsy, can the insurer reconsider the claim and cover the surgery/treatment as cancer treatment?

Has anyone experienced a similar situation, especially with Aditya Birla or another Indian health insurer?

What happened to your claim, and what documents helped (operative report, frozen section, histopathology, etc.)?