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: 836
Hash: 2531cdaa860c278b6c2b557f416142fb8497d884a85c6f1c634cb1372d0d8a9d
Previous block: 7a45299caad978bba7ed586c688a2a5d3f633791aa2d099d1af8e36e1506af23
Next block: 74406b6df61782565d65bca1cdc2169ae75806568633ca828f88812ef1c117ba
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1707857808
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: a4fc052b86550661a62d9799ea3da6913eba13a37725647c13a013a1ab37b9a0
Median time: 1707857807
Difficulty: 4.656542373906925e-10
Confirmations: 1408
Chainwork: 000000000000000000000000000000000000000000000000000000000000068a
Bits: 207fffff