Children are individuals with their own feelings, thoughts, and emotions.
Relationships naturally evolve with time and age. While your granddaughter may still love you, you may no longer be a central figure or significant focus in her life. She’s not the two-year-old who once perhaps found her grandmother fascinating and eagerly anticipated visits and phone calls.
At 12, she’s becoming more independent and developing new interests. She may not want to speak with you as often—or at all—and could even find conversations with you uninteresting or burdensome. She might view your attempts to connect as overbearing. It’s also important to note that not everyone enjoys video calls or texting, and some people simply aren’t glued to their phones.
She could also be going through challenges in her life, making her less inclined to socialize.
Additionally, it’s unclear what kind of relationship you’ve had with her or her mother. Her mother might be protecting her from behaviors she considers harmful or toxic, based on her own observations or things your granddaughter has shared.
I understand this situation is painful for you, but it may be something you’ll need to come to terms with. Over time, the connection may continue to grow more distant.
It’s not unreasonable for her mother to avoid forcing communication. Your granddaughter is growing up, and not every child remains deeply attached to their grandparents, especially not in the way they might have been when they were younger.
The decision is yours if you can deal with late or no responses in regards to gift giving.