So if I understood the post correctly you are using the breezliquid api to receive directly to a boltzhq invoice to exchange directly to liquid? With a function to schedule transfers out of liquid to an onchain wallet? Or are you also staging to a breez lightning node which then gets inbound liquidity opened up by automatically using boltz to liquid exchange? 

 Your first assumption is correct. The funds are received and held by the user‘s liquid wallet on their phone. There is no lightning node on the device, so no need to manage inbound liquidity. Boltz handles all of that.