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: 2121
Hash: 5afe71bc7ca788f8be897394a8d257216462c054076799c17fad47a9ddd397fb
Previous block: 01c564d3256e734af75c991aa8870710c2c71a389de0e1a64cef6d6e6495d5bc
Next block: 7f4a5b1c0a8cd106291e0908631f817c25b7c316e9230ac1e84cc56773907625
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1728964790
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: fb9ecf4339a3e0a0a5b25ec8fcaf28d6e21bf064e3be94963302907cfde93ba7
Median time: 1728964789
Difficulty: 4.656542373906925e-10
Confirmations: 123
Chainwork: 0000000000000000000000000000000000000000000000000000000000001094
Bits: 207fffff