No, no sign of the Titanic's compass platform has ever been found.
The location of the Compass Platform is shown on this plan of the Titanic's Boat Deck, and this plan of the ship's profile. You can see it was located directly above the First Class Lounge.
The Compass Platform contained the ship's "standard compass", against which all others would be judged during a voyage to maintain accuracy.
The Compass Platform was a structure built from wood, bronze and canvas (no ferrous parts which might affect the compass). It all probability, it was washed off the roof of the 1st class lounge as the bow section plunged beneath the surface, or became detached when one of the funnels came adrift. There is certainly no sign of it in the photographs taken of the ship by Dr Robert Ballard or those who have surveyed the vessel since.
Of course, the wood and canvas would not have survived on the sea bed, and while it is quite possible that the bronze elements do survive, I can find no record of them being recorded and identified in the debris field.