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: 1802
Hash: 2d99c77590654b0e752dc095b69bde74f75e6164e5d766bdd0944f7e5e30e61c
Previous block: 1c570812f5fd63017d39c48e21d579cb21e0ed86a960d5f20e3ecd8f3b0bf8ef
Next block: 782b01e1b9a661ab26711a5d6ee1c542e8b48df9d38cef091efdf75be3435e0f
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159224
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 28c2e163708f4b57f1fa41e12d4549491ec3acf47a05aa11498b8c0c8adc1993
Median time: 1719159223
Difficulty: 4.656542373906925e-10
Confirmations: 442
Chainwork: 0000000000000000000000000000000000000000000000000000000000000e16
Bits: 207fffff