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: 519
Hash: 01c9ccfc5e32b8aca26369d5a71093990158f5da0960802824eb492c17563457
Previous block: 151bd3880be8fd859e4cda96ed7a4d9841a3f1b4929eb479446ff6d5d81fb787
Next block: 75e5d0c39ea6fd34610d63b6b1b7f5d3b049797cbb36838db540b39c23d5e35a
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864230
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: ffd89f7451409af84269dbcb93bd951b5294a7389b50a20a4e8594c66508516a
Median time: 1701864229
Difficulty: 4.656542373906925e-10
Confirmations: 1725
Chainwork: 0000000000000000000000000000000000000000000000000000000000000410
Bits: 207fffff