RE: Date in Tile View of Dashboard
Hi Aneesh,
Appologies, I migth have not expressed correctly my last post. I did not mean the quick search that's available on the Navbar
I'am not able to understand what's the component that contains your All Accounts View in the Dashboard, as I do not see it at the moment on my trial OOB enviroment
Despite of this let me go back to the original question, in attempt to answer your concern. Allow me to take the example of the Customer field available on the Case form
The user is able to retreive for Accounts, or contact records with the help of the LookupView set on the Customer field
In this example, we see that the lookup displays the Account Name, and the Account Primary Address1 data in the card results.

The information that appears in the results of the card is system managed. As far as I am aware, there's no way at the moment to modify this 2 fields from the results of the card entiries
The results that you see on your View works seems to work similar with the entires that we can see in the Customer field. Therefore, I do not see way at the moment to add or replace your Last Modied Date field from this list.
What information do you see when you use the all accounts view in the Customer field? Do you see also the Name of the Account, and the Last Modified Date fields for each hit result account?