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: 1665
Hash: 782366dc90d04db9199f0b2e643fea9cb271323ec225993d220cfe0b3def44f8
Previous block: 0df391657deb0edc7dee6e61bf25c4d0d35696c823adb08a49f48a87c4c3ab5e
Next block: 51f7081ebab3574dcdeb1966428852d0533b978cd311a62cef30c005c0849fd9
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159201
Stripped size: 218
Size: 254
Nonce: 5
Merkle root: 7ebde26de65a6dabef451c2b3000097e980b68e1e352d30b7a52000a28a0b1f8
Median time: 1719159200
Difficulty: 4.656542373906925e-10
Confirmations: 579
Chainwork: 0000000000000000000000000000000000000000000000000000000000000d04
Bits: 207fffff