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: 459
Hash: 4418222242920b6502112f21cc5f0405bbabfb52766b74f4f629ab1bb4d1af9b
Previous block: 4a2a5ae12f6513314db94cacac94875beb3cb82a2e1d9b3eb870400b214adf30
Next block: 7ff2793617912d5f3ac0f1b3931c5145dabd8f06f30a907939ec3d29146288cb
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864220
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 5add941200da212338de788f9b3eb07c02cb0a57273b38ac52e32ce1b039bd10
Median time: 1701864219
Difficulty: 4.656542373906925e-10
Confirmations: 1785
Chainwork: 0000000000000000000000000000000000000000000000000000000000000398
Bits: 207fffff