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: 817
Hash: 1f7fb47cd7af47526406d1ba2aef825423caf0501e4046ab0570cdf8dde40e7c
Previous block: 2d8dcb6aded2b173f941da6974395d39b74ede03fc2a3da751278a24baa09e94
Next block: 5cb21196e82ce945a8eb0cd15991971878b303dc8e46900d7082724e2de27f86
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1707857805
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 1a387c87d07a3d979245d119718c3b08e70d8da59f8b9fd546f7b33f20ae824b
Median time: 1707857804
Difficulty: 4.656542373906925e-10
Confirmations: 1427
Chainwork: 0000000000000000000000000000000000000000000000000000000000000664
Bits: 207fffff