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: 499
Hash: 38d8af425774d9a8d699e294b51a11df40c1a3a6423bc8f373eb35d5aef8d7c4
Previous block: 648c538a36b073d460a85b576b0bb872d305a64d9ddbda2f24ca25e693e28753
Next block: 3d6888258a8a549ef607f0fce1d07f64894b17f61f9905f47a29aa88773b38e9
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864227
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: ed6cf7909c294dbf743ccacafb259cc2c62e8516e04d1848aee420ee8a8c2d8d
Median time: 1701864226
Difficulty: 4.656542373906925e-10
Confirmations: 1745
Chainwork: 00000000000000000000000000000000000000000000000000000000000003e8
Bits: 207fffff