I'm just about to cross the 100,000 mile mark on my 2016 Cupra
280, 92,000 I put on myself. I used to drive 20,000 miles a year before COVID just doing the 80 miles a day commute to work which made visiting the dealer a regular occurrence!
Aside from regular maintenance items, I've had to have the thermostat housing, water pump and differential replaced due to leaks at a cost of £3k. I also had to replace the plastic oil sump with a pressed steel one after grounding the car somewhere left a tiny hole leaking oil from the sump.
Brake discs and pads are expensive if you're sticking with OEM and need to do all of them at once, it's possible you may need to if the discs haven't been changed yet.
Search on the forum for heater matrix / radiator / silicate issues and budget for that potentially too.