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: 687
Hash: 253c66785d380d554a3449323fe0db3a12862d615ee9c1e22d013dbf50d4c4ae
Previous block: 68740b66bffae51eb8d9681607b81ccc39e6be6ac88ad9c49f0bd48ede0f0d6c
Next block: 30f56e19d06f257db8836213adafcc068be0d5e3bb602afe080e469c05d6c2a6
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864258
Stripped size: 218
Size: 254
Nonce: 4
Merkle root: e5f09ab6b191784bcbb0f828c69d5fae9f5e023474cf886e8ac32a5de42084fc
Median time: 1701864257
Difficulty: 4.656542373906925e-10
Confirmations: 1557
Chainwork: 0000000000000000000000000000000000000000000000000000000000000560
Bits: 207fffff