Eight hours later and the funds still aren't back in my on-chain wallet.
Does Alby require you to "manually trigger the sweep?"
"If Nothing Happens
If your wallet hasn't automatically swept the funds after several confirmations:
Some wallets require you to manually trigger the sweep (check settings or support docs)
Contact your LSP's support - they may need to provide guidance specific to their implementation
Ensure your wallet is online and synced to detect and claim the output
The 2-week warning in the LSP's message is the worst-case scenario if you had force closed, but that shouldn't apply here."