If I had to guess, Nuvia's expertise will be used to optimize Qualcomm's ARM, Adreno and Hexagons for the next generation of Snapdragon cx. Qualcomm and Microsoft dipped their toe into this market and now that Apple is all-in, they need an answer to the M1. They won't get there with reference designs from ARM.
But once they're producing optimized ARMs for SoC apps processors, who's to say that they couldn't re-enter the server space?