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: 1603
Hash: 4c9d76e63f7aed1404441fa34b348e42b5cad88f7ad2ee521925876cd96b3688
Previous block: 41abd359f314050a752cb3dbd08b43e2ee6fc03bb264f29dfcd864ce2984998d
Next block: 1838e565dfcaf1c23de3d0820f55166a26fe8e41d925760b6d006c1f13446895
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697675
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 9980b7c4d5274e640bba411aa41f23309dbb7e4a53dc31b0ab1625be369dd023
Median time: 1718697674
Difficulty: 4.656542373906925e-10
Confirmations: 641
Chainwork: 0000000000000000000000000000000000000000000000000000000000000c88
Bits: 207fffff