Currently in process of replaceing front crank seal on my 2020 LM2. 160,000km.. been leaking for about 10,000 km now.
Its a little lengthy repair due to the inability to access front crank seal with todays compact design.
Seal is not actualy leaking, rather the metal seal/assembly cover plate.
No gasket is specified from dealer, the seal/gasket is red RTV high temp silicone bead to form gasket.