I think the issue is:
Were Nuvia's designs licensed to ARM for servers, so therefore how much % of the design can be used for non-server?
Or, was Nuvia's products in general licensed to ARM for servers,... therefore the same engineers and product can be used completely by another company?
Well, I assume you mean licensed 'by' ARM, not 'to' ARM - ARM are the IP holder and have no practical interest (apart from royalties) in the finished products.
The problem there is does a license to use something to design a product / asset mean that the licensor has additional control over that product/asset in terms of future development and how it's used...? Without the contracts being made public that is hard to answer.
I'm not sure how enforcable the use of a general purpose CPU core being restricted to certain market segments actually is - if it's a soft limitation based on royalty payments, etc., then again I expect this to be settled.
To complicate that even more, the designs are (supposedly / by all accounts) NOT using ARM standard customer IP (i.e. not using Cortex-A/X) cores - the CPU core design is Nuvia/Qualcomm customised - so what say can ARM really have there...?
I sense there is likely an 'intent' in the contracts for ARM to maybe try to enforce this approach but I suspect there is enough ambiguity in the contract itself (i.e. this specific type of scenario regarding taking over someone else's IP and assimilating it) that Qualcomm think they can defend their position.
The summary version of ARM's claim is "
that Qualcomm violated the license agreement by using designs from Nuvia without Arm's approval" - we have no idea what rights of ownership ARM has on those designs (which are legitimately now Qualcomm assets in terms of whatever ownership Nuvia had). If those designs utilise say some amount of the ARM Cortex IP blocks directly, then ARM possibly have a credible case in terms of some right of approval / ownership.
No doubt Apple said to ARM. "Hey those Nuvia engineers left us, now they're giving away our design to Qualcomm. Stop them."
Surely that's Apple's problem and if true they could pursue effectively themselves - and get the payout directly from any judgement rather than some latent gain.