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: 648
Hash: 3ff423bd622ffa98b4be5f4e3741ea0c1f0badaaf9016df7f49938ef97e9be1a
Previous block: 24984844a6accd7e222df801cc78159c815828bd1015ec75d86cd1df6a1a5651
Next block: 112c8eb24299d914ce9fb01f9f6cd2307fd01f5a08ab35f75c8e4ea31104f1f4
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864251
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 7a3fb268a85437bf66538b821dcfc4b7996daf833ea74a03dda35200273ed562
Median time: 1701864251
Difficulty: 4.656542373906925e-10
Confirmations: 1596
Chainwork: 0000000000000000000000000000000000000000000000000000000000000512
Bits: 207fffff