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: 1226
Hash: 0a1944ca3b71f04ca722d56b1a5c500e9c741e310861488125f5559dbd05f913
Previous block: 3e8a0efe73b81585dc44879bb243a666e2ee3b1e85067a6fd8b984522037692d
Next block: 75eb3a41729124fb75590edc12d884db312869e4b2f1dab1280f0231c485df4c
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697612
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 702954cfd2d5f0511b49cbedb66ee36b905e4b318c84724bf2c01b4e8bdddc76
Median time: 1718697611
Difficulty: 4.656542373906925e-10
Confirmations: 1018
Chainwork: 0000000000000000000000000000000000000000000000000000000000000996
Bits: 207fffff