Currently, the only way I know to see when an account was last reconciled is to find the divider in the ledger. It would be nice to have this much more easily displayed. One option would be a new column in the accounts view, which could potentially be optionally selected by an additional configuration option. It might also be possible to include it in one or more of the sections on the home page, such as the Assets and Liabilities summary.
This was introduced with commit 68ac2fe9a737dc58e4bfc81e43df7f744ccb0a90 on 12 March 2018. I assume it's too late to tag the commit with resolving this bug.