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: 664
Hash: 256269e408add1287a76606f7bf9fff65dd71ef3c162d679e4d16b88a0a5fcc7
Previous block: 5a250fe74eb1d68e7c6d6b4445d539938ff1967bebb749617c6434340c858047
Next block: 5a5fa0978761f55b8f195bb40310d17ea1af65ed5d4982512e703cf6e56104fa
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864254
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 8995ea8a5226fb1ae7d3c4f418bb3ab5ce47c30ce5b614ce631bda3b98a0121c
Median time: 1701864253
Difficulty: 4.656542373906925e-10
Confirmations: 1580
Chainwork: 0000000000000000000000000000000000000000000000000000000000000532
Bits: 207fffff