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.

home    blocks

Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mxMfLjAez

Height: 428
Hash: 554d6f2c30e34b0539fde6d73e206fa1fb28b8268b34d367e8f3b3f0b04a3361
Previous block: 14f57ad51a0d5b359a87199643771b64064cfb493bc98f176d672c515282e3c3
Next block: 0025988ab2271250ec16eac814d0148965a78cfabd3160632c8c215c4bff6ee5
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701864215
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: 88662d7716866c757327117aebf4f8f94d254ec87e1636b8c71847712d653e52
Median time: 1701864214
Difficulty: 4.656542373906925e-10
Confirmations: 1816
Chainwork: 000000000000000000000000000000000000000000000000000000000000035a
Bits: 207fffff