2 Unique Questions About Google Sandbax

Hi Guys,
I am relatively new to the world of SEO and posting a question here about Google Sandbox Phase. I started a camping related blog in the begiing of the year and have been uploading content on regular basis. At this point, I have around 150 posts on the blog.

However, only 31 of those posts are indexed so far as per Google Search Console. Very recently, 6 of my posts we de-indexed by google and they are now showing up in "Crawled But Not Indexed" Category. Assuming that my blog is...

2 Unique Questions About Google Sandbax