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: 591
Hash: 691d6e3f6cb0a23adac4e298f2e8e85b06978fd405dfc704b784cf52559dacd8
Previous block: 20c7433e08b7c2b318de56e47215a7b2e306c58b24feb7779f455075714d0846
Next block: 55744c6e742c52a8f119d598c60159b357283cd231e903b294de311c5c545e49
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864242
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: b2a366b5d33305a5357ff574a77b833551d88fc98ff7a9e07ee9f3373a8ec51b
Median time: 1701864241
Difficulty: 4.656542373906925e-10
Confirmations: 1653
Chainwork: 00000000000000000000000000000000000000000000000000000000000004a0
Bits: 207fffff