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: 451
Hash: 12f9b5975430265ee3c01b7b3441c5ffe3205a5d4624d2f481a2d29c9bfeaffb
Previous block: 187ef553ee880f107f66e765ae56d17881ce3df1c7b2e6d30b7c6cd6fe179a20
Next block: 4adb5ac82d93b7dcef488321b1ad0ac7f96840bce42adaa39021fbea0142da5f
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864219
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 1cff8fc156f4538489c947d833ef36a7ce7f08d9e98b16a27fb2e3c2e3a15446
Median time: 1701864218
Difficulty: 4.656542373906925e-10
Confirmations: 1793
Chainwork: 0000000000000000000000000000000000000000000000000000000000000388
Bits: 207fffff