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: 678
Hash: 370d568066323cbdd02e975fc1239a437bf204571a73a55cc6ac6217446540a3
Previous block: 6171f36e85d6092bef215dd143c2fe3db4388a7935508a7aa2719a7567d07c86
Next block: 1960513359556388278b0178f7d73d3e555442f246bdb7753f72676e746fd343
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864256
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: ca3d1bce2abc78d416fa5bad61036fc2d8f288ecf18d68f371ce4de5f85f013c
Median time: 1701864256
Difficulty: 4.656542373906925e-10
Confirmations: 1566
Chainwork: 000000000000000000000000000000000000000000000000000000000000054e
Bits: 207fffff