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: 575
Hash: 37c48677ce67ba05f440db1265181f1eb27495e7fda18a1f3dfcc2b32e593027
Previous block: 64586f8265a86563db83cf293f17e8dd64cda05a8f987a80fb2464b527345662
Next block: 08631842f46d3bac2a43f7ad6fed796df50a4af08f568bf50e4ed8b96509b657
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864239
Stripped size: 218
Size: 254
Nonce: 3
Merkle root: 65cd90be3dcf2b51b676e98091af31ef9aff0e4b73592e16c2afaa6bea9a44d7
Median time: 1701864238
Difficulty: 4.656542373906925e-10
Confirmations: 1669
Chainwork: 0000000000000000000000000000000000000000000000000000000000000480
Bits: 207fffff