Q. What are the different search features in Google and other search engines e.g. Bing, DuckDuckGo?

There are many comparative charts highlighting search features of different search engines.

Try: Karen Blakeman's website compares Google, Bing, DuckDuckGo. (Last updated 8 September 2021).

A simple rule of thumb will be to read the fine print or explore the Advanced Search options if available e.g. Google Advanced Search.