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: 652
Hash: 198893e56bffadd2b7fc286a57395966371357bd6b5c2078c5c19ce11b58bdeb
Previous block: 05b32e9e78ae73a43a8360619cc7458da6ff15270fe548c5b5076bf4b289a3aa
Next block: 43f7627a92732978ba28bb9dfe08531518a37115a54011269ae407684dc3861e
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864252
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: d0006b4d7694e5f6f0e6da2d8518f38fd83b4f01ed0e2a5d3f29d283f970d4c3
Median time: 1701864251
Difficulty: 4.656542373906925e-10
Confirmations: 1592
Chainwork: 000000000000000000000000000000000000000000000000000000000000051a
Bits: 207fffff