What to check on delivery

• That you have the car insured
• That the car is what you ordered
• That the documentation you get lines up with what shows on the car
• That any accessories you ordered are correctly installed
• The date the car was manufactured
• How much fuel the car has
• That the registration documents have your correct details on them
• How many kms is showing
• That ther are no scratches or dents
• That all basic functions work
• That the outside and inside trims line up
• That ther are no rattles or squeaks
• That the software is the latest version
• That the car is digital connected to your or others that will be using the car, phone
• If a EV or PHEV it has a standard charger, charging cable and appropriate adapters
• That the App works with the car
• That you fully understand how to operate and understand ALL the safety functions of the car.
• How to find out about all the other functions of the car.
• What to do and who to contact if something goes wrong with the car.

Then spent the next few days slowly reading the manual

Most likely many things I have left out. This is all I could think of. I'm sure ther must be lists you could Google up