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: 1321
Hash: 01e90445ee0dceff128a8770f024f723385dbc4017635d7f7a7271df9437051d
Previous block: 70526cd5f3b2785c796c0bb8b7c88376122652f5eed57b3a10b6f020bc0afe7d
Next block: 2a2b1f1b5801f98a7b353a038f5911893458ac3ca122981007baa257f5ffcdc2
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697628
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 022fb601eeafb1732d43f74632aa688f649b56d85373faee8900662d4c9bac7b
Median time: 1718697627
Difficulty: 4.656542373906925e-10
Confirmations: 923
Chainwork: 0000000000000000000000000000000000000000000000000000000000000a54
Bits: 207fffff