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: 1644
Hash: 50cafbeb0c3479949fddadb3d760410f78afc6c537135a887344bd497c373746
Previous block: 4eec641bacc7575756dbdbbd3d7360af94ef7163b9ce8bde33737de85068bd96
Next block: 45c86f0bb6180abaf96e4db7d70bb97a0055e91273f467a72b202d2c46482d16
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159197
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 169c21a768b5f956260badbf4aa06d309ee23998bf84dbe4cc6e14a1caeafa37
Median time: 1719159196
Difficulty: 4.656542373906925e-10
Confirmations: 600
Chainwork: 0000000000000000000000000000000000000000000000000000000000000cda
Bits: 207fffff