The only essential accessories I can think of are front mud flaps and maybe
ppf for the rear doors/fenders.
These aren't essentials but of all my accessories they are the ones I like best:
- S3XY Buttons
- Touchscreen swivel mount
- Real doors handles (attach with 3M tape)
- Wide angle side mirrors
When I ordered the S3XY buttons I also got this
neat phone mount but, unfortunately, it and the buttons are both out of stock now. Also, I think the price on that phone mount has gone up. I got the touchscreen swivel mount from AO a few years back. I don't think the other accessories in the list above are available from AO.
Other AO products to consider: air filters, arm rest cover (if you have a white interior), jack pucks, performance pedals (if you didn't buy a performance), center console usb hub, usb-c upgrade module.
I like AO, they are good people but if I can buy the same product from elsewhere, it is usually the same quality but significantly less expensive. My experience with AliExpress has been good despite the long shipping times. I recently got a ring key there for about half of what it costs elsewhere.