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: 609
Hash: 3e42d792f01b575232fee2a22e775df5c47c3f77106a97b1d2ab05f30469859e
Previous block: 4bc83df26a20e1b28c885c7eeae8f0fbcf39c1831a60c7b0677bec9e8ce758af
Next block: 495c0846a2f3b6dc17ea67d6b4912342c19cfde121cadbe28aad11b87fce360f
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864245
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: c3bde1bcd920a7b4700e077ff2834eed9994ae54112d2e23204ebe02e270402f
Median time: 1701864244
Difficulty: 4.656542373906925e-10
Confirmations: 1635
Chainwork: 00000000000000000000000000000000000000000000000000000000000004c4
Bits: 207fffff