Boltz is the primary submarine swap provider so I'm assuming their btcpay plugin will automatically swap incoming lightning to on-chain BTC thus eliminating the need to create inbound liquidity or even a channel. nostr:nprofile1qqs0eac2gh86s9l24qfmnw52xawhz0f3d862yleaetpafygjmanaxlspzamhxue69uhkycmpwd6zuemfwf5kumewdaexwtcpz9mhxue69uhkymmnw3ezuumgdacz7qgwwaehxw309ahx7uewd3hkctcef6el4 correct me if I'm wrong I haven't looked into the btcpay implementation specifically.