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: 919
Hash: 3c88051330ad69f8bc9a6ae0d7ed97fa0267273d943eff77d3f80dd2119f5ebf
Previous block: 6272143e0383771870c666cc14cdc6ac101425fad7c0c96e1c665c505500a604
Next block: 65689bf95ff4b6f374fa75be3bfd048c8ab4e22c1613d5f796ac1fdd9d7e7300
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1707857822
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 2a4f5d9949a2fe181302629d249b5fd9dd5545bfd527289d34db98ada063c77e
Median time: 1707857821
Difficulty: 4.656542373906925e-10
Confirmations: 1325
Chainwork: 0000000000000000000000000000000000000000000000000000000000000730
Bits: 207fffff