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: 1844
Hash: 644b3d56f1849d27b35b044801306f022a222dff46e9acfe7aa91dd813515a76
Previous block: 30f21167d2ffd86c76c3c51f04ffdfcbc4148c5c583c31b324fda9f341ca8dd2
Next block: 457fcc3556e2349c11b8bae2b14827ca083da0a68cadded55cc5d918d27b9894
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159231
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 030a62e00c511cdfe27c6a1dc0a3f1606e327820b5bf2fa6be0a52653f29488f
Median time: 1719159230
Difficulty: 4.656542373906925e-10
Confirmations: 400
Chainwork: 0000000000000000000000000000000000000000000000000000000000000e6a
Bits: 207fffff