Nuvia makes _chips_ for servers, not the servers themselves. Given that Apple also makes chips, it seems like a pretty fair argument
But not _for servers_. It's like saying Qualcomm is a rival of Intel when it comes to CPUs. The two do not overlap at all.
2) Seems like the whole "rival" piece is not material to the lawsuit itself and is just a bit of editorializing on Reuters' part. The lawsuit probably centers on duty of loyalty and breach of contract