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: 612
Hash: 4b83b102f99d2f35df73d7d6be802f2ede70da8202b69f3a999f38bbf33ecde7
Previous block: 72817f8e8ec5b855a3126c5e98f7ea4180fc2b82f9e416fb6c87a98db0c24daf
Next block: 789414be9447706cf76880222c902dd58e265934351385364da5c1af7037854f
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864245
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 71077587612f3a2636b47a1e19cac3071011127306986f0a577d6363029c1261
Median time: 1701864245
Difficulty: 4.656542373906925e-10
Confirmations: 1632
Chainwork: 00000000000000000000000000000000000000000000000000000000000004ca
Bits: 207fffff