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: 603
Hash: 466422dd6271be60cdebf447608a5a51fb1f5f6caa1721bce79529503f00370d
Previous block: 5250559b6ca9247e3db922b810ade3e96d03c954785db8c5e6794d8e6fdb50af
Next block: 648a73815cbed4e941008ecd5a510d406f3c06929d12f1a3fb643677934b0e65
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864244
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 35350261452efd46d5f3cedde17f01b7fb10711264ea264ff660b628f6016923
Median time: 1701864243
Difficulty: 4.656542373906925e-10
Confirmations: 1641
Chainwork: 00000000000000000000000000000000000000000000000000000000000004b8
Bits: 207fffff