Docage to all the best info on your "new" Triumph Trophy 1215.

I think I’ll leave it there then.

Numb Bum - Various aftermarket products available such as Air Hawk / Gel type seat covers,
neither of which solved it for me and I ended up with a "Pre Owned" Russell Day Long Seat
and a "Cool Cover" for the hot summer rides.

Cruise control.  I added a pair of "Grip Puppies" as I found the grips to be too small a diameter
for me, and found that these were much more comfortable and gave me greater throttle control.
I can't remember ever having the cruise control inadvertently disengage when using them.

Handlebar grips - If you remove the storage box under the left grip,
( remove one external bolt, one internal bolt then pull it upwards and rearwards
to release the two pegs at the front edge from their rubber grommets ),
you will be able to see where the Heated Grips would be plugged in as shown below,
and you will then know for sure if you have them or not :



It is possible that they are fitted and the Instrument Panel Icons are not activated,
in which case they should still heat up when switched ON,
but note that they only work with the engine running ! 
If they are fitted and do get hot but no Instrument Panel Icons,
report back here for information on how to activate them !

If they are NOT fitted, and you want them, you may be able to persuade the seller to pay for them,
as they advertised the bike as having them.  You will find however that Triumph no longer has any stock
of the complete Heated Grips Kits, in which case LET ME KNOW and I can advise how to get them !

Fuel filling - the fuel tank is shaped something like a Star Trek Klingon Warbird !
There is a "cage" inside the filler to prevent the fuel nozzle from being inserted too far and potentially causing damage.

The best method I have found when filling up is to hold the fuel nozzle vertically with its end
resting on the bottom of the cage, and not to fully squeeze the trigger to prevent any "blow back". 
When the fuel reaches the cage, the trigger will automatically cut out, and I don't then try to add any more !

Note that after refuelling and riding off it can take a couple of minutes / miles
for the new fuel level to register on the fuel gauge !

If you find you can't adjust the mirrors for your preferred rearwards view,
you will find that the Clutch and Front Brake Master Cylinders both have threaded holes
( which may or may not have rubber sealing bungs in them ) that are designed to accept
standard stalk type mirrors - both holes having an M10 x 1.25 right hand thread.

Later versions of the Top Box and Pannier straps had modified "fixings"
with larger / wider washers used under the pop rivets,
so drill the old rivets out and use large "penny" washers under new rivets or nut & bolt.

One other thing I should mention - you might notice that the Trophy is quite W I D E   

975 mm (38.3in) (with panniers fitted)
955 mm (37.6in) (without panniers)

Cheers 

No they arent, they are all part of the fairing!

You're already using it if you have heated grips.  If you don't have heated grips then they've either been removed at some point, they've failed for some reason, or a fuse is blown.