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. mupBAc74k

Height: 2220
Hash: 6067196b18208110277a3ca2ad6d9c5c206f003c31e535a5589a8116df61f8a6
Previous block: 6a7ea5eb8873d36577f0c1f7640ff33e990f21db23fb21d203edd16a8e0ec1d7
Next block: 653f0690ef7b6226bfb3dffe21226002f64be467dcbbe8a91b2be4442264fe24
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719480979
Stripped size: 218
Size: 254
Nonce: 4
Merkle root: a9e0b6443e3149fa47e59d8a5432086d4e575413e60ff96b342d4ed751aa08e8
Median time: 1719480978
Difficulty: 4.656542373906925e-10
Confirmations: 72
Chainwork: 000000000000000000000000000000000000000000000000000000000000115a
Bits: 207fffff