Wanting to apply for a B2 visa for my mother, who is 75, retired. My father has passed away many years ago, mother did not remarry. I am her only child, have been in the US for more than a decade, am a permanent resident. She has never come to visit or applied for a visa, she didn’t feel comfortable with the long haul flight/language/food/healthcare. I have always visited her. Since COVID she’s been wanting to come visit, wants to take the trip before she is too old. A critical requirement for the B2 visa is to show strong ties in the applicant’s home country. In her case, it is perceived as a weakness. Any advice how to improve her chance?