A couple years ago I started messing with btcpayserver on an rpi and I had a couple bigger channels open. One day my BTCPayServer failed to upgrade because of an error with Postgres & 32 bit ARM compatibility. Long story short a dev tried to help me debug and my DB got wiped in the process. While I thought I had backed up my channels, it appears the backup file didn't actually write anything to the file and was empty. All I have are the keys to the wallet the lnd node ran on. Are there any chances of recovery from the lightning channels that have presumably force closed by now? My channels were with lnbig and bitrefill
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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).
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Channel closings due to errors should normally make onchain transactions back to you
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