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: 840
Hash: 7b0113b0dbe849a7b413526bd2621a8a1c4fc941eb916776bc56ae19f7c182b2
Previous block: 7479b33dcd65477103ecfab3428549e655370766b8c053e88d9629b889bdcc11
Next block: 445a63f4a595953330b1349c6cd1e95df1371570476f4a65383f931e9addb918
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1707857808
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: cfe1fcaa796f6de8a6245eef131d9d2136a783037c87ad5c7dd7728b9a3b7d41
Median time: 1707857808
Difficulty: 4.656542373906925e-10
Confirmations: 1404
Chainwork: 0000000000000000000000000000000000000000000000000000000000000692
Bits: 207fffff