Hey!
It is true that the ECC team has been focused on NU5. It’s the most significant technical upgrade in Zcash history and it’s super important we get it right. I want the wallet live as much as you!
That said, the Ledger issue could be solved by anyone with a wallet who wants to make the integration a priority. Although it’s not performant - I think it takes several minutes to create a proof and I’m not sure if they are still optimizing it - I think it could be integrated into Zecwallet, or maybe even a mobile wallet like Nighthawk or Unstoppable via Bluetooth (not entirely sure). Maybe you can ask them about prioritizing it?
We did speak with Ledger about Ledger Live and there is a process. I believe Zondax knows the Ledger team well and should be able to speak to the process for getting it supported natively within the Ledger Live app.