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: 426
Hash: 02206a606b06783d8f31c9ffffbc2db4413f6bb8d19c37022fe1a52af7bbd23b
Previous block: 2970e20a6b1938b7a7d787a68ee7451b164de8e17d6254feaf62c3231ba4c241
Next block: 14f57ad51a0d5b359a87199643771b64064cfb493bc98f176d672c515282e3c3
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701864214
Stripped size: 218
Size: 218
Nonce: 2
Merkle root: 1d87bd2fd49d4b249f3f489be88f7e3f497508e8afc51aa86e1d7da667cd90b1
Median time: 1701864214
Difficulty: 4.656542373906925e-10
Confirmations: 1818
Chainwork: 0000000000000000000000000000000000000000000000000000000000000356
Bits: 207fffff