only really an issue for the electrics…which there are many!
if you run your Dashcam from the cig lighter then it shouldn’t affect warranty - if there are any issues witch the electrics I would remove dashcam from car before going to see Cupra just in case they try and say it was caused by the dashcam.
if you are hard wiring the dashcam in then they could say any electric fault may have been caused by the dashcam and may charge you rather than fix under warranty.
As most things are electrical on the
Formentor I would suggest not hard wiring and instead using the cig lighter as I do.