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: 800
Hash: 564371e192f9a2f724d243ae476400a149b1c50e4243a429e7374d70c76d8e4e
Previous block: 3794501747be2366a4e72606ae5b6d62d473acd894035011418416273340a80e
Next block: 766a3821eae2b3b97978243da27263e81bf8006839247b0efd7cd2cd7e3d09b9
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864277
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 1cc42fb1b49c075f181b407dc63ea711c82e7270cd9ce208e161d86d7cb0db57
Median time: 1701864276
Difficulty: 4.656542373906925e-10
Confirmations: 1444
Chainwork: 0000000000000000000000000000000000000000000000000000000000000642
Bits: 207fffff