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. mkrgsKuFE

Height: 1590
Hash: 17a0ff427081b79f6264f0352991921cf8bcf13cf0ff7aef4f82bf692772614a
Previous block: 00b768867f1cb0fc3215545ee8637d131e3e5f7a07f88014143515f76c1f206a
Next block: 4d0d30df96260d5dba8a84c8f9fe7812f0a801832bd7298366c97cc1c905b97e
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1708932134
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 86e5be60d60873193d3954f741c5cb7b4011cca6e76e1d2efa6dcc8ea468c2ee
Median time: 1708932134
Difficulty: 4.656542373906925e-10
Confirmations: 19
Chainwork: 0000000000000000000000000000000000000000000000000000000000000c6e
Bits: 207fffff