You can save your own settings I think, but there is nothing which directly replicates the favorites in Analog Lab 4.
The problem is, Spark is all but abandonware, much like their iPad synths, and its interface and features are three generations behind the current Analog Lab, having been developed round about the same time as Analog Lab 1 and V Collection 4. It seems very unlikely Arturia will refresh the interface / functionality in line with current apps, or add new features, even though your idea is a sound one (pun unintended).
More's the pity that Spark was removed from the V Collection bundle from V Collection 5 onwards. I knew right there and then that Arturia were basically abandoning the app.