There would be no point in running a livery without any association to the event with the Petit livery. The previous factory liveries for the entire run of GTLM have been underwhelming and forgettable so why go back and pull those up? They're corporate mashups with the same required colors the LMP program and Audi used, zero orginality of any kind.
The liveries were meant to celebrate the run of the program not a previous winner or singular event. They aren't great but likely a quick turn around project for the team.
https://racer.com/2020/11/10/porsche...bring-sendoff/