Should I message her friend to ask if she’s okay?

My ex / best friend of 4 years (/ex for 1+ year) ghosted me a month ago. She send me an ig reel and never responded to anything I said ever again. She’s still online on her socials, but she’s just not opening my messages.

We’ve basically been normal friends for the last year, although before that our friendship was a bit awkward sometimes due to my feelings for her.

At this point, I assume that she started dating someone and felt awkward about staying in touch with me, or he’d rather not want it.

At the same time, I do wonder if she’s okay. She’s been struggling with depression for the 4 years that I’ve known her, and she’s sometimes withdraw herself from others. This was usually for a few days and even then she’s usually respond to me, although scarcely.

I’ve been considering asking one of her friends if she’s okay, just to make sure that I’m not leaving her alone in a time when she needs friends to keep reaching out. I’m fairly certain tho that she’s purposefully ghosting me, although I don’t have a clear reason why.

It’s been an online relationship, so I don’t know any of her friends in person, and Im unsure if they’re aware of my existence.

So what should I do? Is it weird to approach one if her friends to ask if she’s okay?