Why would they not index a domain with this TLD?

I'm just finding it hard to rank a site, might just need more content adding I guess. I've not been able to find any of these sites in the search results though..

I see a few .tools domains indexed:

• site:.tools

Anytime you want to search for a specific TLD just use the site: search to filter down to whatever you need, example:

• site:.com
• site:.net
• site:.org
• etc...