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: 427
Hash: 14f57ad51a0d5b359a87199643771b64064cfb493bc98f176d672c515282e3c3
Previous block: 02206a606b06783d8f31c9ffffbc2db4413f6bb8d19c37022fe1a52af7bbd23b
Next block: 554d6f2c30e34b0539fde6d73e206fa1fb28b8268b34d367e8f3b3f0b04a3361
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701864215
Stripped size: 218
Size: 218
Nonce: 3
Merkle root: b4e4ab83f2140084f08518acc993279bd70c68b3e8a1a6f64e7448ff71fc2cd2
Median time: 1701864214
Difficulty: 4.656542373906925e-10
Confirmations: 1817
Chainwork: 0000000000000000000000000000000000000000000000000000000000000358
Bits: 207fffff