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: 1843
Hash: 30f21167d2ffd86c76c3c51f04ffdfcbc4148c5c583c31b324fda9f341ca8dd2
Previous block: 0bd4fa672ef4ce66928bf2c13eca49bd5f2e753b8def633906b9776dde66fc74
Next block: 644b3d56f1849d27b35b044801306f022a222dff46e9acfe7aa91dd813515a76
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159230
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 6d48bc4c8c4e782ccbb3d0bddd9eac61303d64e69e30ad0541de4841531870a5
Median time: 1719159230
Difficulty: 4.656542373906925e-10
Confirmations: 401
Chainwork: 0000000000000000000000000000000000000000000000000000000000000e68
Bits: 207fffff