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: 1892
Hash: 4f73e63c501be7525cdceb59385d20152b589304f1e9c970b15abf75b3ffaf82
Previous block: 3552842d42edc1ef430a6bb02f80eaea98dc289eedef64ec81dbfb23bad30f32
Next block: 125774db02564248fff8d4fa3dbd55b42c16aeb0dd28285647d3a7a8fb44febc
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159239
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 2a0c660dff72d69653237966f725ae2b98bdb5083f0f4292e7d4219da7d190c6
Median time: 1719159238
Difficulty: 4.656542373906925e-10
Confirmations: 352
Chainwork: 0000000000000000000000000000000000000000000000000000000000000eca
Bits: 207fffff