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: 1521
Hash: 3a40b138ef3200b6d4635bea3d7616596e62ca35f772918f6b371b7a838fbe87
Previous block: 5e5f50d28b69664382effb6c927a3b89a544d3548476950bc38cb596831b63da
Next block: 42336eb91b1cfebee1ac211e2b26dd08c5424b208d57b39f95df33e657b13f89
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697661
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 44e7b10a4186183a483e46130a009b95d8663d0398d1c189f664bdb9a7ed72ac
Median time: 1718697660
Difficulty: 4.656542373906925e-10
Confirmations: 723
Chainwork: 0000000000000000000000000000000000000000000000000000000000000be4
Bits: 207fffff