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: 2540
Hash: 6cb8b2f1aed263bd508ba248692c94f72208d64245e91a4e605ab4937a786f88
Previous block: 6e7006b2d88ee314b21fa9739df8b728d214d7f94fbf72044b6df32ec3327e08
Next block: 21e000041b29cbf4daa6e598ed9c3427ef2df7d4f349609826b3cf6f426f42c3
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1743847310
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: e9301ad04f8e9a5a953d474b678d1b8687c3c73c22d0c93f73e0d7b99952675e
Median time: 1743847309
Difficulty: 4.656542373906925e-10
Confirmations: 103
Chainwork: 00000000000000000000000000000000000000000000000000000000000013da
Bits: 207fffff