In the v13 release, the Legacy Visualforce Matrix has been replaced with the more modern and feature-rich Matrix Lightning Web Component.
Migrating is a page change in Lightning App Builder: your data does not move and nothing is rebuilt. See Migrating from the Legacy Visualforce to the Lightning Web Component Matrix, or contact us and we would be happy to help.
The My Timesheet matrix can be added to the Home tab, on standalone Lightning Pages, and on pages within your Experiences / Communities and allows Resources to track their hours where it’s most convenient.
This matrix will only show assignments that have been assigned to Resources related to the current logged-in user. Resources are related to a user via the User lookup field on the Resource detail page.
In addition to the provided My Timesheet matrix, custom standalone matrixes can be created by leveraging the ViewUserAssignmentsOnly and StandaloneUserMatrix matrix parameters. Details can be found here: Create a Custom Matrix.
