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: 614
Hash: 0f3b51e54426baa2eeafe87bd04d36364da351e763ab891fd3bd8528596578e8
Previous block: 789414be9447706cf76880222c902dd58e265934351385364da5c1af7037854f
Next block: 42c8e55f3c18b397ad3053c67883a57fd6de24650b69ae7fc789acb18b911fa1
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864246
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: b84cce67d788f850ef10af1421257421d255d3cbde31c5a18c0d963f280e4234
Median time: 1701864245
Difficulty: 4.656542373906925e-10
Confirmations: 1630
Chainwork: 00000000000000000000000000000000000000000000000000000000000004ce
Bits: 207fffff