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: 605
Hash: 28dc3113dd546fa7d903236508867feca115579079d4b53efc1a2ccfe0504578
Previous block: 648a73815cbed4e941008ecd5a510d406f3c06929d12f1a3fb643677934b0e65
Next block: 5b8b44ba6cf6fb6a7b4f10b330be19e13e0547b799205496e6c9d6966c56ae89
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864244
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 2ed006e6c2828a9765006a82c82f961fc3d2b0d4790accfe0a06ffe293825c3b
Median time: 1701864243
Difficulty: 4.656542373906925e-10
Confirmations: 1639
Chainwork: 00000000000000000000000000000000000000000000000000000000000004bc
Bits: 207fffff