The static channel backup (the empty file I guess) allows you to ask your peer to force-close the channels. Furthermore, you can use this file to derive certain information that is necessary to access the funds for closed channels - but I don't think this is necessary for new-ish channels, anymore. If you can, boot up a node with your seed phrase and see if it matches your expectations. If you want to trace your on-chain transactions (including channels you contributed funds to), you may want to use a tool like BitBook (disclaimer: I wrote that).