If Boltz and Aqua (Boltz being non-custodial) are still exposed to government-shutdown risk... then no mass-market wallet is safe.

Non-custody of funds should protect these wallets... however Phoenix was non-custodial too and it shut down. My understanding is that the reason they shut down was their liquidity tool... and profitability being an LSP (lightning service provider). They earned a small commission 'helping' people open lightning channels, earning a small fee in the process while providing inexpensive 'liquidity' for inbound transactions (at a small fee of course).

They were doing this non-kyc?

That is the entire LSP model... and if they're at a shut-down risk then I don't know how any of these wallets will fare if they really got big enough at least in the United States. Bitcoin has survived because it cannot be shut down, has no single point of the failure is like digital roaches etc lol