"Desperate"? Hardly. Here's the context into which this move fits:
* Starchucks has been in Target stores for a decade or two (or more?);
* When Covid shutdowns hit, Target made curbside pick-up a major part of their business model (as did other stores, e.g. Walmart);
* When Covid shutdowns loosened and then no longer affected it, Target kept the curbside pick-up, even though it reduced in-store traffic, because customers liked the convenience.
In this context, including Starchucks beverages and eats in Target's curbside pick-up was a natural move. It's more $$ flowing into the store generally, and into Target's partner Starchucks particularly. It is likely that this move was test-marketed before the whole self-inflicted trans-kerfuffle.