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: 681
Hash: 19b441ffa85fb2c10ac731dd795e68bf2f52568f34d15e3fa14ffd218fd22ebe
Previous block: 1152e6f751610a135fdd0fc1018bfc12538df06f01e680a44078203c464beb42
Next block: 2c3c7223609784887f9859bf7c9dffb9617ef021375cbfc9b77f93df087e8673
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864257
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 82342baba38b7b58ce125404d00113f2010f3eb8e86956ee7fa596adc12bc131
Median time: 1701864256
Difficulty: 4.656542373906925e-10
Confirmations: 1563
Chainwork: 0000000000000000000000000000000000000000000000000000000000000554
Bits: 207fffff