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: 402
Hash: 355eb591a74c6adb2bc187461765239a322c15d71aa2a50e4190901df633d3a8
Previous block: 0d5a85187736c60be5417d93adc169df3161fcff11b8b7eb05d6f223e691850f
Next block: 03c3e4e7e43b441438384e0dbc18fd811aa5c50a3b384e5aed21b06b3ac43019
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597934
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: a39ed45ceac4cb3f78004ce027fce6edeea08e77a8f8cb292bf64793b8c6a319
Median time: 1701597933
Difficulty: 4.656542373906925e-10
Confirmations: 1842
Chainwork: 0000000000000000000000000000000000000000000000000000000000000326
Bits: 207fffff