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: 458
Hash: 4a2a5ae12f6513314db94cacac94875beb3cb82a2e1d9b3eb870400b214adf30
Previous block: 4ec784ed9dd1a8f5507000b987906437429dd927ea7f33a3c51d5b59137bd334
Next block: 4418222242920b6502112f21cc5f0405bbabfb52766b74f4f629ab1bb4d1af9b
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864220
Stripped size: 218
Size: 254
Nonce: 4
Merkle root: 34edb50f16617a74da8520fdc9b0b35b73b254a11137d2e90291dcdffe5f2526
Median time: 1701864219
Difficulty: 4.656542373906925e-10
Confirmations: 1786
Chainwork: 0000000000000000000000000000000000000000000000000000000000000396
Bits: 207fffff