Google not indexing domain names

In addition to the decrease in DA, another problem that is faced is that Google is not indexing some domain names, reducing the revenue options for the domain investor.
In some cases, like walletshopping, the domain is not being indexed in google, only the directory corresponding to the addon domain is being indexed, which is not of any use at all. The directory continued to be indexed for more than 7 days, till the domain investor tried other options to change the indexing