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: 853
Hash: 2f2fe01e1933f91180bf0bf0ffa25c0cfe6fdd9e11930b77b08be1975b6e35c0
Previous block: 3832d7910cf7211dcd7229b329becf046a1f4f55eb0931722c692a84ce51eb93
Next block: 1484a08513b3b03afa6f668e9ad4ae8995bbb36d04725fb0cdac4a0f0b3148a1
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1707857811
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 510c293a8dbe6adcc0290e003fad85ebc8a3282338ce9b56bd5aa19d5b253c12
Median time: 1707857810
Difficulty: 4.656542373906925e-10
Confirmations: 1391
Chainwork: 00000000000000000000000000000000000000000000000000000000000006ac
Bits: 207fffff