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.

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Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mxMfLjAez

Height: 613
Hash: 789414be9447706cf76880222c902dd58e265934351385364da5c1af7037854f
Previous block: 4b83b102f99d2f35df73d7d6be802f2ede70da8202b69f3a999f38bbf33ecde7
Next block: 0f3b51e54426baa2eeafe87bd04d36364da351e763ab891fd3bd8528596578e8
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864246
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 6b6cd75b790c35e3a115c0312481ab292f9fda41dd1f280427cc541c9ad18955
Median time: 1701864245
Difficulty: 4.656542373906925e-10
Confirmations: 1631
Chainwork: 00000000000000000000000000000000000000000000000000000000000004cc
Bits: 207fffff