The moment
Saving a seat for a friend who is running late can be tender, especially in a group where places form quickly.
A useful detail
Do it lightly. She should feel expected, not pressured to arrive on a schedule she cannot control.
Keep it human
If she cannot make it, let the chair go without making a point. Belonging works best when it is easy.
Let the person be the point.
A gift is optional; a sales link never replaces a useful gesture.