My daughter has a May 2019 Cupra and I replaced the spark plugs last year, based on age only, buying the correct NGK plugs was not easy when dealing with online NGK sellers as they tended to think that the plugs for the slighter earlier engines were okay for this engine, so watch out for that. The air filter I'll replace this year, again based purely on the car's age - and it has low mileage, probably still under 20,000 miles.
It will probably have a silicate pouch or similar inside the coolant reservoir, if it still has G13 coolant in it, it will benefit from having that pouch still in there, but I'd suggest removing the pouch or replace the reservoir for a later one that does not have any silicate pouch etc in it, then change the coolant to G12evo within a year. The reasons being, many owners found that the silicate pouches slit open and the granules circulated in the coolant system and got trapped when they reached the point with the smallest diameter piping - which is the heater matrix, and that costs a bit to sort out. Later version of coolant which is G12evo does not need these pouches to maintain corrosion protection.