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: 500
Hash: 3d6888258a8a549ef607f0fce1d07f64894b17f61f9905f47a29aa88773b38e9
Previous block: 38d8af425774d9a8d699e294b51a11df40c1a3a6423bc8f373eb35d5aef8d7c4
Next block: 794ae3dc14951649b25801e749a6b38e16117576531cf26f9fd3eb1de27ff917
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864227
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 4d1963279c754925825f56f037c90960d277270346db23edf6b9b21c4f9f5f45
Median time: 1701864226
Difficulty: 4.656542373906925e-10
Confirmations: 1744
Chainwork: 00000000000000000000000000000000000000000000000000000000000003ea
Bits: 207fffff