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: 30
Hash: 4375ad4fd80c033943e0db9d7c52077c7162e3f5ff9504b0006f828f2a31f2d0
Previous block: 01cd20c30a1b214d8460be979f68ae619f8acdd14bbe384c94bd39d681d06e02
Next block: 119a16f1e3d52ad6af7d2638107aaee3860f4fc8ad66d43bba73018e0fec8c26
Weight: 868
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701597872
Stripped size: 217
Size: 217
Nonce: 0
Merkle root: 1701f3288c113fef4aab4b5c4d44606d1dca1e996315db257c5c346d862e94d3
Median time: 1701597871
Difficulty: 4.656542373906925e-10
Confirmations: 2214
Chainwork: 000000000000000000000000000000000000000000000000000000000000003e
Bits: 207fffff