iPhone Spotlight search content

[emil234]

I would like to ask you about spotlight search content in third apps like WhatsApp, Facebook messenger, Fiber. I use them all the time and I thought that the content of these apps I can find in spotlight. It looks like I can find only the app or the contact included.
Sometimes I need to find the time of appointment (or something else) but I do not remember which apps I have used. Then I thought that I just search content by time or day in spotlight.

I'm using iPhone 7 with Polish language.

 

[emil234]

I just add link to Viber where they show that it should work.
https://support.viber.com/customer/en/portal/articles/2217639-ios-9-spotlight-search