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: 576
Hash: 08631842f46d3bac2a43f7ad6fed796df50a4af08f568bf50e4ed8b96509b657
Previous block: 37c48677ce67ba05f440db1265181f1eb27495e7fda18a1f3dfcc2b32e593027
Next block: 7e81719c7369b6e414a55b9bbe054ef1b5d0e4c7157f527895bab8454eac63e4
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864239
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 4730d6b594c9834f4f2cf26e67985a46294186a69c8611bf689e4939881dc639
Median time: 1701864239
Difficulty: 4.656542373906925e-10
Confirmations: 1668
Chainwork: 0000000000000000000000000000000000000000000000000000000000000482
Bits: 207fffff