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: 431
Hash: 6b3db51574dd509c18ac5df5f7e160b9c2f747c68a773fe2be4e50287968f19d
Previous block: 366533078f849bbc56d7efe71b21c9dedc32c940ec870f7dd3bd89cfe86e81b2
Next block: 555c6f7f57935f43a459b9b99d8627b937af948906dd8a193708836bce9f1ac9
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701864215
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: c82860b233fc9dd810e955c506f38c2670c8d641a47677fc4bbbe3755cb636c4
Median time: 1701864214
Difficulty: 4.656542373906925e-10
Confirmations: 1813
Chainwork: 0000000000000000000000000000000000000000000000000000000000000360
Bits: 207fffff