Hm. I know I've done this recently.....and said things like "I wish I could hug you" and said I would be here and support them.
I do mean those things, though obviously there's a limit to how much one can offer something concrete when friends via text and separated by oceans, physical ailments and a complete lack of money (couldn't even shout anyone a coffee/kofi right now).
My best to offer is a caring ear/shoulder - but I'm not meaning to overstep any mark, seem ingenuine or anything.