I would recommend you dedicate time to reading through the information in this thread to see what others have done. You will also want to review the manual on the IRCC website in detail.I am her only surviving child. My only sibling died 20 years ago. She is in Canada now. Her brother, who is a Canadian citizen, invited her for a visitor visa before our PR approval. So, she came with us when we first immigrated to Canada in 2024; she just went to the USA once for 5 days with my husband, as there is the 6-month limit on a single stay. She came back again to Canada and continues living with us. But considering the old age and the harsh weather, it is too difficult for her to take this journey. About H&C, how to increase the chance of the approval? If you have any ideas, please suggest them to me. I would be grateful to you.
I would avoid having her leave Canada since there is never a guarantee she will be allowed back into Canada. She should apply for extensions from within Canada instead. It's quite possible IRCC may refuse to extend her status at some point once she has filed the H&C application. If that happens, she should remain in Canada without status until there is a decision in her application.