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: 403
Hash: 03c3e4e7e43b441438384e0dbc18fd811aa5c50a3b384e5aed21b06b3ac43019
Previous block: 355eb591a74c6adb2bc187461765239a322c15d71aa2a50e4190901df633d3a8
Next block: 47189ba846aada60db10269bcb5840d0995838bc89a7a77b5e2cbb8ae1bf7767
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701864211
Stripped size: 218
Size: 218
Nonce: 7
Merkle root: 873bceea09837d5154193c02e5b9041e156fef73c8896a501d1e6c4cf5eaf9b8
Median time: 1701597934
Difficulty: 4.656542373906925e-10
Confirmations: 1841
Chainwork: 0000000000000000000000000000000000000000000000000000000000000328
Bits: 207fffff