Don’t know how to help my friend

I’m going crazy trying to help/be there for my friend but I feel pretty worthless. Her dad is dying and she’s devastated. I just try to be available for her (text or phone mostly, she’s always traveling to see him so she doesn’t really have time for visits) and keep telling her that I’m praying for her dad, I love her, if she needs anything I’ll help in any way I can, etc but it’s just...not enough. I’ve made some specific offers but she always says that she appreciates it but is okay.

She has a great husband and other supportive friends so it’s not like she is just stuck with me but I still just want to help and can’t figure out how. She says talking helps but I feel I should be doing more