Seeking Advice: Porting Senior Parents’ Health Insurance from Star Health

Looking for advice on porting my parents’ health insurance from Star Health due to poor service/support experience.

Dad: Star Senior Citizens Red Carpet since Nov 2023. Angioplasty in Sep 2023 with 4 stents, diabetes and hypertension(Medication). All disclosed and accepted with a 36-month PED waiting period. Age 66

Mom: Star Comprehensive since Nov 2023. Thyroid and hypertension, both on medication. Recently found to be pre-diabetic, but currently not on medication for that. Age 54

Both have separate policies. I’m considering HDFC ERGO, Care, Aditya Birla, ICICI Lombard, ManipalCigna, etc.
Would love to hear from anyone who has successfully ported senior parents with similar pre-existing conditions, especially regarding underwriting, continuity benefits and actual claim experience.