Advice; Declaring Retrofit Modifications

[will_0407]

I am considering getting some retrofits done next year- 360 cameras, electric seats. They'll be done using genuine audi parts and by an audi approved technician. Do these modifications need to be declared? I am only asking as when I have used comparison sites, there is no option on their drop down lists under mods which are cover the aforementioned options I'm looking at adding.

Thanks.