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.

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Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mxMfLjAez

Height: 567
Hash: 4b23c6dd0b2fe2b353368a2d4d59501fb2ee1d492815e278b0bec414a29ec543
Previous block: 4454585fa3878e73c22d9b39387c672c3b92d31f4f3011c08e50c4ce006e4e59
Next block: 0eee1105d2082584391b947be4b131255489a240aa27ae6cb7b64631eb1e80e0
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864238
Stripped size: 218
Size: 254
Nonce: 4
Merkle root: d5ddab76a14a8dcb6a58bf56eb1d4c589793cacb692da7837cfeb8610813234e
Median time: 1701864237
Difficulty: 4.656542373906925e-10
Confirmations: 1677
Chainwork: 0000000000000000000000000000000000000000000000000000000000000470
Bits: 207fffff