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.

home    blocks

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

Height: 71
Hash: 40c8d12bf2d65a4efbc605711617d3ceab338a99589a2318ead298e458b598b8
Previous block: 13b7b04e30d67c29bd8170f08090d521f5a1965e1e6203e8fa59456186927c6f
Next block: 42e81a23abedeb5a9aa2fd13ffde8007105280c23ccb3ab9863d94f7e4dc4037
Weight: 868
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701597879
Stripped size: 217
Size: 217
Nonce: 4
Merkle root: 5242a2bf408b820ba8d4ce775f4284cad0c42000a5ad64d8affa2e0b859fc10b
Median time: 1701597878
Difficulty: 4.656542373906925e-10
Confirmations: 2173
Chainwork: 0000000000000000000000000000000000000000000000000000000000000090
Bits: 207fffff