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: 577
Hash: 7e81719c7369b6e414a55b9bbe054ef1b5d0e4c7157f527895bab8454eac63e4
Previous block: 08631842f46d3bac2a43f7ad6fed796df50a4af08f568bf50e4ed8b96509b657
Next block: 02b2351fa08de83f8aba64ec82117f571627863d6638f63d906f567a42c27239
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864240
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 0703298ef8f3aa13806c0c65f12a8f9ba973e2796dd61d3449bc5a3faa6bd124
Median time: 1701864239
Difficulty: 4.656542373906925e-10
Confirmations: 1667
Chainwork: 0000000000000000000000000000000000000000000000000000000000000484
Bits: 207fffff