Used car warranty at Cupra Leon ST plugin-hybrid

Moin! I decided for a Cupra Leon ST as PHEV (EZ at the end of 2021, 30700km) and signed the purchase contract. Now the dealer tries to give me a used car warranty from the GSG (belongs to CarGuarantee). I can only choose from 36 months. The dealer thinks that actually everyone makes such a guarantee with a hybrid. I have actually already decided against it, but unfortunately still have my doubts. Hybrid system be covered, but I see a lot of negatives in the net for the CarGuarantee and don’t want to throw my money out to the window. But if the guarantee is good, then the gut feeling would be better. Why would you advise me? Does this make sense with a PHEV?