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: 802
Hash: 4b91b7c096f17661b31308870f41e21543fe8b1a5ec0f91b82313a50c457e6f7
Previous block: 766a3821eae2b3b97978243da27263e81bf8006839247b0efd7cd2cd7e3d09b9
Next block: 3421de62e78cce602f943df4e6809f6bd14f66ddda55ff6a2a154b64c7d9628d
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864277
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 5ec27a03b0801e0c2c14ce8faeef99b549000462c99ba53d5532c97561911d9a
Median time: 1701864276
Difficulty: 4.656542373906925e-10
Confirmations: 1442
Chainwork: 0000000000000000000000000000000000000000000000000000000000000646
Bits: 207fffff