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. mkrgsKuFE

Height: 1581
Hash: 34d63f2e494435656eefaf3b145cfaa7d56321149ba5e20639c3e87e96168f42
Previous block: 76b9bede89331c9ceb9ff9ce7bd701c442df8bead52e939d65495efb5a9b79dd
Next block: 5a6488aa90b4bc065132ea54e4d66d4ea60c3830fc2bbf0f87c5e4e09f65babf
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1708932133
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 14f15920fc80e4a90edbd24811a7dda79963aed9f7a76dd7e269dafd6ce2adec
Median time: 1708932132
Difficulty: 4.656542373906925e-10
Confirmations: 28
Chainwork: 0000000000000000000000000000000000000000000000000000000000000c5c
Bits: 207fffff