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: 120
Hash: 7481ade58ee99b21eb63ddd9b3bbf3b11ec7da87b6c25ad4653aeabb9b0c55f3
Previous block: 0f9988f3646b6b10463cd18d3fd011f133c2188174014a5a800deedc1b97d9ff
Next block: 4478d7222552f1ca0eb8734a80287d0f0164098dacd1d02a9468f2788b133bc7
Weight: 868
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701597887
Stripped size: 217
Size: 217
Nonce: 4
Merkle root: 2a3986d7f143bf87b3a25233f79b76bc7939e0ac38d9fbc9a02ed8c176fe34b5
Median time: 1701597886
Difficulty: 4.656542373906925e-10
Confirmations: 2124
Chainwork: 00000000000000000000000000000000000000000000000000000000000000f2
Bits: 207fffff