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: 1851
Hash: 486a3112e6ce7b629b7907a01166cdc25941b972edd21a4c2e4db09b8f8c2ff4
Previous block: 3670748cb83540a990739ad55f9cf4649880dd9e9b4dedf787c1c4b6ac944d8e
Next block: 7dca50a1c380d5b4eb4b6a051c4c4989229611382b359458174329e731a0f710
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159232
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: eec574e4c1285f4a7a569b64ad7cabb60e3b2c03e153c7dc0e9d8458c54dad89
Median time: 1719159231
Difficulty: 4.656542373906925e-10
Confirmations: 393
Chainwork: 0000000000000000000000000000000000000000000000000000000000000e78
Bits: 207fffff