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: 342
Hash: 7509b7e31454a6e8596b0b0464380cac557fc0b701faba4db7e30b6369027e1e
Previous block: 7779bdcc6f9fdfe273e93258d033fe2024fe892bccf260b5ab10bb78ed635818
Next block: 6ce95c432a9aded74bfdc76502d8424f63a51bc09b35e4a4d9111e80f8e1afa4
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597924
Stripped size: 218
Size: 218
Nonce: 2
Merkle root: 8b8beb6005faeca3bbc5253c4b977b5b64865b97d7b4c97bf959f0250fd1cc88
Median time: 1701597923
Difficulty: 4.656542373906925e-10
Confirmations: 1902
Chainwork: 00000000000000000000000000000000000000000000000000000000000002ae
Bits: 207fffff