We are getting back home soon. "is getting" here is present progressive or simple future?
if get can be used for future plans like leave ,come , and go , is there somewhere to prove it?

Question

We are getting back home soon.   "is getting" here is present progressive or simple future?
if get can be used for future plans like leave ,come , and go ,   is there somewhere to prove it?

Answer

In your example, "get" means "arrive" (actually, "get back" = return). We know this because "get" is followed by a destination.

We know it's about a future time because of the pattern "are ___ing" + "soon".

Answer

The main verb is to get. It's the present continuous used with a future meaning, indicated by the adverb soon. There is no future simple tense in English, although sometimes the simple present is used with a future meaning, with timetables and schedules. For example, the train leaves at 8 p.m.