I have been using L-BTC (liquid) and I would like to suggest you to add this 2nd layer solution to your services. I would certainly use it and I believe other members would use it as well.
https://liquid.net/Purely out of curiosity, have you tried using
https://boltz.exchange/ for Liquid swaps? It's what
Aqua wallet uses for its swap functionality. I've used Boltz before for Lightning and it worked really well.