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: 125
Hash: 28ce4a5704f733fbaf5c5c5a092da9bbc19fb1046efa7af253fd3980d8f246cc
Previous block: 093af6bfc42028796e36b4602f01862c8d1b9346a5e0d66d554297400fd562af
Next block: 4bc5d9596cddc190bcdf296a6bb12c4734e6f4e0031fc3c899bf6149eabea12a
Weight: 868
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701597888
Stripped size: 217
Size: 217
Nonce: 0
Merkle root: ededcfbad425bf46b87da66887669a333290f449fe92a4cced5c519fe7d0f711
Median time: 1701597887
Difficulty: 4.656542373906925e-10
Confirmations: 2119
Chainwork: 00000000000000000000000000000000000000000000000000000000000000fc
Bits: 207fffff