Welcome to the community @jjmmww1 !
My advice is to check all electronics and features so that they work.
Everything from electrical windows, heated seats and central locking to cruise control and sensors and so on.
On my DS7 the driver door automatic un/locking didn’t work. That was 500 eur to fix.
My night vision camera also had to be replaced just recently.
Thanks for the reply i’ll check all of those. Any idea if the recent repair to the adblue tank and dpf is anything to worry about? as it was a £2500 repair receipt they had for it as well