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.

home    blocks

Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mxMfLjAez

Height: 524
Hash: 3701e86ffb427e54683958f0e4d2eea7f409301c0d1cd77751724163a1fd1f0c
Previous block: 17868de718d895d413d40124f5705ab7d9cee2e66dad85b0cf7d95a1ce3cf6b3
Next block: 0e3288cef32b64cb41242ec0d76c210552b1656584571d3bf8c4e200473ed363
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864231
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 36e3f4f1f751d0c1dc819ff61153138314122df793998b831a4b345fdaaea092
Median time: 1701864230
Difficulty: 4.656542373906925e-10
Confirmations: 1720
Chainwork: 000000000000000000000000000000000000000000000000000000000000041a
Bits: 207fffff