Filed history related lists in Lightning experience – Available with Summer 17 release
Filed history related lists in Lightning experience, With Summer’17 release Field history related lists in lightning experience are available. This was not available in lightning experience before summer’17 release.
If Field history related lists are already added in salesforce classic version, those are available in lighting version as well with salesforce summer’17 release. If field history related list is not added, you can add this related list to your layout in lighting version.
If you want to enable field history tracking on lightning version, go to object manager, select an object, click on fields and relationships, click field history tracking and select the fields to track and finally add object history related list to page layout.
For more details on this refer salesforce summer’17 release notes.