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: 1654
Hash: 559b69e381fb41c93d363323c0bb21a4eb6855297dd529f415488b3d68493d8b
Previous block: 67a07ef745b01482724a275e469e6bd36c85fd8c032eaff117ac0daabf6da2a4
Next block: 3a1277f899409e8ce5d1da920d868856b113c119b22f2a7fdf2fc92f21814fa4
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159199
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 3e2f9a4f420bfe1c57c5ba3cc6efb581e2527ee82f9ce05bf64a5376ec39f985
Median time: 1719159198
Difficulty: 4.656542373906925e-10
Confirmations: 590
Chainwork: 0000000000000000000000000000000000000000000000000000000000000cee
Bits: 207fffff