The explorer is running in 'regtest' mode. This saves disk space, but there is limited data.
The code for this application can be found at github.com/pdxrod/blockchain_explorer.

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Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mxMfLjAez

Height: 72
Hash: 42e81a23abedeb5a9aa2fd13ffde8007105280c23ccb3ab9863d94f7e4dc4037
Previous block: 40c8d12bf2d65a4efbc605711617d3ceab338a99589a2318ead298e458b598b8
Next block: 7111d3bf026d796bde1b66d02d30cc7a3760d973d584a5c7992a4381901b282d
Weight: 868
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701597879
Stripped size: 217
Size: 217
Nonce: 0
Merkle root: 4e49529b50a9cbed98393497adce75668ce3aec44593294ae74f8bd39a3d1581
Median time: 1701597878
Difficulty: 4.656542373906925e-10
Confirmations: 2172
Chainwork: 0000000000000000000000000000000000000000000000000000000000000092
Bits: 207fffff