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: 1667
Hash: 27507bd3ce0a328d8ab27f0ec749501e3d9a7aef24c1061fa193d80a10a24099
Previous block: 51f7081ebab3574dcdeb1966428852d0533b978cd311a62cef30c005c0849fd9
Next block: 28570e18c3e5fa64f3aede858f89adec7d7c4c1dd94b213f9180bed42515841d
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159201
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: d27ae9379b7789fb8e433758b32d141f204fc1b347f0332e1f89c43fa1cfae2f
Median time: 1719159200
Difficulty: 4.656542373906925e-10
Confirmations: 577
Chainwork: 0000000000000000000000000000000000000000000000000000000000000d08
Bits: 207fffff