Has anyone who drives the car been using hand sanitiser or similar alcohol based hand products? There’s been a few reports over the last couple of years during the pandemic of alcohol based hand sanitisers causing damage to leather steering wheel rims and similar damage may well happen to a leather covered gear selector lever through regular contact with alcohol based products. Alternatively, does anyone who drives the car wear any jewellery that might rub against that part of the gear selector (e.g. if they drive resting their hand on the selector)?
You could try making a warranty claim but I think Seat would be likely to decline it and say the damage is the result of an ‘external influence’.
Replacements are available - this one from Aliexpress is very cheap too and is available in matt silver / chrome as well as leather;
Smarter Shopping, Better Living! Aliexpress.com
www.aliexpress.com