I have been working on SEO for my website and basically all my pages were discovered by the search console and then 2 days later, just dissapeared.

No pages have been added since and that was nearly 20 days ago.

Is it normal for Discovered - currently not indexed to show and then dissapear?
It would seem more logical if it slowly converted from not indexed to indexed.

I can't seem to find the answer for this and I've tried to be patient but I'm not sure.