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: 400
Hash: 5566db45c2a183c6451526be960255624f44ccfd24a0c155aef68f8c8e9f709b
Previous block: 114ef8012e37b2931cd0f46f8fd17ed60112606ec9450806321e1f02166e6e38
Next block: 0d5a85187736c60be5417d93adc169df3161fcff11b8b7eb05d6f223e691850f
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597934
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: 5f994077c11b143da678f02107c7af470f1ba75d38590e6c6857387782b8f109
Median time: 1701597933
Difficulty: 4.656542373906925e-10
Confirmations: 1844
Chainwork: 0000000000000000000000000000000000000000000000000000000000000322
Bits: 207fffff