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: 551
Hash: 56b9e0cacb2753199dfaedd8c64db6dfabc5b363386291da40508db15963d056
Previous block: 2f16c6faae4a8fa33cfd996f8eeddb44ecd94e4bfe6e566b92914a0e816e92c0
Next block: 46cab00c0abfa1c76dda82ccaf05d93be27f870dee23eae73ed338ee521e80d6
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864235
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 168414f1c0e3cf492d2496703d09cafe8d3f840b364439ecc4dd5010ef570cce
Median time: 1701864234
Difficulty: 4.656542373906925e-10
Confirmations: 1693
Chainwork: 0000000000000000000000000000000000000000000000000000000000000450
Bits: 207fffff