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: 1839
Hash: 3d629535e8fa9d56abf2c77c3a5e5402a292d77b3fbea298e737d3c88d610a54
Previous block: 5f05adb8570ddf75c62ae338d5eb30f4c4e39ee6a3debb6e912019f3a4db9fad
Next block: 2ed8263136c530cea895ef48ef001c26acb3948e2563b7a4563bf182d8df1e13
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159230
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: b25f1241160bddf651b0310cf5ef1fa4abec49c27e7c7ef955b069047e3040be
Median time: 1719159229
Difficulty: 4.656542373906925e-10
Confirmations: 405
Chainwork: 0000000000000000000000000000000000000000000000000000000000000e60
Bits: 207fffff