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: 1727
Hash: 256cb5ec55ac7f8b888b549a804a1794b965418d5defde841cd1dace2b570286
Previous block: 65da5721ae8c51046666eb925781a640a941a7fc7eed51a9ca32e4e70da66ee6
Next block: 0eee2a64aa34fc15d8c9c514d4e7467b9cbd15af76f46b5998322edb46c8f23c
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159211
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 05bcc9d4c42533c0e7d25666b6f3ecf2ee2ebd7aedc82b74a4c9e8310eff6f45
Median time: 1719159210
Difficulty: 4.656542373906925e-10
Confirmations: 517
Chainwork: 0000000000000000000000000000000000000000000000000000000000000d80
Bits: 207fffff