An app for SDK 3.2 and 3.1?

I have developed watchface for SDK 3.2 as it shows Solar charging Intensity for solar models.

I am getting requests from potential users with older watch like fenix 5 (SDK 3.1) as they love animation (it is not related to the solar charging) on the watch face to develop SDK 3.1 compatible version.

For SDK 3.2 it is easy to detect does watch model supports or not solar charging and displays or not solar charging indicator.

But watchface compiled for 3.2 is not compatible with older models.

I think it should be possible to avoid developing two dedicated versions of the very similar watch faces just to be compatible with 3.2 and 3.1.

Please point me in the right direction how to redevelop app to be compatible with SDK 3.1 and 3.2?