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: 452
Hash: 4adb5ac82d93b7dcef488321b1ad0ac7f96840bce42adaa39021fbea0142da5f
Previous block: 12f9b5975430265ee3c01b7b3441c5ffe3205a5d4624d2f481a2d29c9bfeaffb
Next block: 0608836e92a1afe7c741d80bf6ba97a2f9eeaafdf211fe8f767bf38fd4d4a1ca
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864219
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 4b75b44358e9657957526f1474d701f311991ae2da6a7ec32d168ffaa9ed70e1
Median time: 1701864218
Difficulty: 4.656542373906925e-10
Confirmations: 1792
Chainwork: 000000000000000000000000000000000000000000000000000000000000038a
Bits: 207fffff