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: 353
Hash: 173aa2ce690af5a904cee08395cbe234d1551396b82de2beb491a9e370423ae0
Previous block: 35d14b0dd984070dbb51515150b46fbd2476cb89e6316da6d06c5b3205c45447
Next block: 42d8ad9dc824387d9b25d398d49b7c1cb9ce0e5bef12a7c336a597c8a251a2c8
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597926
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: f615eecd8bf785c498ba6d238efe37969578e5f32ffee3591f374fab679895b1
Median time: 1701597925
Difficulty: 4.656542373906925e-10
Confirmations: 1891
Chainwork: 00000000000000000000000000000000000000000000000000000000000002c4
Bits: 207fffff