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: 1137
Hash: 621ecec128826fd59f40e2b2e766760b8bca618e9c23c090254cbf37c3287cfa
Previous block: 60290643c6ec09454a1a644d6af7911362055ec18cd1b1fd1f8d38f1b0ff60c3
Next block: 08534b0af073f47cb124e855eaaa68f1a5912315b6ce66b5e3105d29de1d14c7
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1707857858
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: d5af4a6c8b59b9a584147def9ffba5a2020f9434f2df582ea1ca6342a3cc85f7
Median time: 1707857857
Difficulty: 4.656542373906925e-10
Confirmations: 1107
Chainwork: 00000000000000000000000000000000000000000000000000000000000008e4
Bits: 207fffff