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: 18
Hash: 26dc5965d49dc567a2d29d27ed9929c38412442f23cd39fb85ab0656bc88c232
Previous block: 4ce5d22f6fac8c872f9fe6e452e2a5289548567eca2cca72b1e5e8d95adf379c
Next block: 3b3bedc75892135c44cf3040f8b53cb8b57b931abee6328ea01e9a8833e23888
Weight: 868
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701597870
Stripped size: 217
Size: 217
Nonce: 0
Merkle root: dd28f74ce761666d4b042e066b5a169c82622cc1834a72b46cc50f76372f59c9
Median time: 1701597869
Difficulty: 4.656542373906925e-10
Confirmations: 2226
Chainwork: 0000000000000000000000000000000000000000000000000000000000000026
Bits: 207fffff