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: 492
Hash: 31072a0f281c8d98b5cf397304c6d40e0bbbf030ff4851846e3999d69621e2bd
Previous block: 6ff181d9451d3d93a776062678cea88328e2f63b71f00751ac34cde62e10e8af
Next block: 592a097972c12f966bb23b873d1db845eeee325f6580dfa26f04bce1a7de755c
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864225
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: fc0671d170410a0b40159bce35ef5a43ff02901d628ad89bdc3cf40338c49d42
Median time: 1701864225
Difficulty: 4.656542373906925e-10
Confirmations: 1752
Chainwork: 00000000000000000000000000000000000000000000000000000000000003da
Bits: 207fffff