Hmmm. Sounds to me like you haven't lost anything except maybe the onchain fee for opening the channel that will now have to be closed because of your lack of backup (SCB). If the channel open transaction made it onto the blockchain then that channel will open and the funds are still yours albeit locked up in that channel. If the channel open transaction failed and never made it onto the blockchain then the funds allocated to that channel should still be in your on chain wallet.

Either way, I don't see how you could have lost the funds. They're either still in your on chain wallet or they're locked up in the channel that you opened in which case you can ask the node that you opened with to force close that channel. Only potential issue I can see is if your channel peer decides to be nefarious and publish a false channel state and take your funds. Normally a watchtower protects against this. I'm sure others more knowledgeable than me can chime in with details on what you can do to recover your channel funds.