Connect IQ SDK 4.0 for fenix 6x pro

Hello, 

I am trying to set title heights based on dynamic input data using the menu2 system on a fenix 6x pro. I have been unable to achieve this goal given my current SDK version. In the 4.0 SDK update I see there is a specific note regarding this issue, and it appears to be addressed. 

v4.0.2

General Changes

  • Update all sample apps to use Monkey Types.
  • Add an API to specify the header and footer item heights for CustomMenu objects.

referencing https://developer.garmin.com/connect-iq/compatible-devices/ I see that the current API level for the fenix 6x pro is listed at 3.2.0. When will I be able to use the 4.0 SDK for the Fenix 6x pro? In the past how has support for new SDKs on older devices been handled ? 

Thank you. 

Skylr