Update:
I am using Obsidian to write my blog and the following plugins:
It keeps the frontmatter timestamps and title in sync.
use this format: YYYY-MM-DDTHH:mm:ssZ
With this I can also use my phone.
Sync failing again. So frustrating, I would like to not need to have obsidian sync, but I need a solution that works both in my phone and in my computer. I debated several times if I should have a self hosted alternative. But would it take too much time to implement and will never be as good as Obsidian, but it seems it might be the only solution.