True, development goes slowly and right now Boltz has unfair advantage of a reduced Liquid fee rate. I hope in the future any PS node can do multihop and advertise it via gossip, so that wallets like Aqua and Breez have a choice.
The last I heard was that the Liquid Federation still needs to formally approve it so it's enabled in liquidv1. Boltz does this as a beta test and mines his own transactions.
Footnotes