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: 855
Hash: 68a6176c62c14e3a24a36c2ae2dc38959027a9733e8b3b5d4bb96df9014a6eb2
Previous block: 1484a08513b3b03afa6f668e9ad4ae8995bbb36d04725fb0cdac4a0f0b3148a1
Next block: 7b95eb04fae119110d01600be5e51136264551d6f0f0c191455d41b53dc975a6
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1707857811
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: a513f259310fdd5f6258a21fa4820ad17647e1ee3e0ed4556da23f0b990103df
Median time: 1707857810
Difficulty: 4.656542373906925e-10
Confirmations: 1389
Chainwork: 00000000000000000000000000000000000000000000000000000000000006b0
Bits: 207fffff