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: 637
Hash: 24771ff43c309c82fda0b97045ed84628d3ad1f5d1e7640d2980df729f2aa6dc
Previous block: 27d8c3a7c13173eebe88da04220c2ed1d3194fc17a48b0eac612cc16a58c834c
Next block: 59a20cb6706cf4be27ca4f022aba4c5254391b368d4630094164eac9cdb0a345
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864250
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: f564c37c108e2824823c25763982ee82c13ac347c4c49bc7a9306948b0f75c49
Median time: 1701864249
Difficulty: 4.656542373906925e-10
Confirmations: 1607
Chainwork: 00000000000000000000000000000000000000000000000000000000000004fc
Bits: 207fffff