How can I get "Continue Watching" back on home screen (Roku)?

Yes. You will want to make sure you have favorited the libraries you want, since that contributes to Continue Watching and the Home screen rows.

https://support.plex.tv/articles/manage-favorite-libraries/#tv-apps

  1. From the top navigation bar focus on Libraries wait for the row of accessible libraries below it. (actually selecting “Libraries” will select the last used library)

  2. Move down to the row then to the far right of the libraries and select the ellipsis menu (…) to see a list of all libraries

  3. Select the Heart icon (:white_heart:) to the right of the libraries you wish to favorite