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: 1522
Hash: 42336eb91b1cfebee1ac211e2b26dd08c5424b208d57b39f95df33e657b13f89
Previous block: 3a40b138ef3200b6d4635bea3d7616596e62ca35f772918f6b371b7a838fbe87
Next block: 0ddb323dc01d6f19417d3817d6418d7de59b154259cfe9d38367db645a72d61f
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697661
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 10e59c4e6f265254d5925e4644cff40b54287728e88429660a8fab25264a75f4
Median time: 1718697660
Difficulty: 4.656542373906925e-10
Confirmations: 722
Chainwork: 0000000000000000000000000000000000000000000000000000000000000be6
Bits: 207fffff