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: 587
Hash: 7643ef992b4d365a180a4564ed79ed0f4ba00c707472e992e55b0a1ff5cd59b4
Previous block: 6033d275701ec40c356b8f154457de5b854d487e2b1bc6e6604e6ca064d91160
Next block: 67312e6fd4614c4b75881b247260b99aaa745797aff5ee297dc85fdae101c985
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864241
Stripped size: 218
Size: 254
Nonce: 4
Merkle root: 64c5c40fc03f2373906407632c1c8b87860e6c2200b04a4265ca1050028c1647
Median time: 1701864240
Difficulty: 4.656542373906925e-10
Confirmations: 1657
Chainwork: 0000000000000000000000000000000000000000000000000000000000000498
Bits: 207fffff