I am not so much perturbed by her 'out of session contact' policy (to promote resiliency & foster independence) than by her response (or lack thereof) to your email. It wouldn't have cost her much to add a 'sorry to hear that' about your grandfather.

If contact is important for you, could you see if she might compromise at all? Or if you see her weekly(?), could you (both) squeeze a session or half-session in between?

I am sorry to read you are going through a rough time and not feeling any support..