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: 1923
Hash: 39e3723899577a0e68d43ee9703f55996a222f33adca864c6eb259b1e61cd9d8
Previous block: 6ec9140af6b9403f80d53726c0f3f5ef0a416fdf93573867e057145bf295faaa
Next block: 57daf6f313515c3e0883cdf924c206e952f059ab911334817d108b2add6adb52
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159244
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: e74fb83505eff677ea4cd70cdeb9923d5edfca81ce42767ba8b7eba567e974f1
Median time: 1719159243
Difficulty: 4.656542373906925e-10
Confirmations: 321
Chainwork: 0000000000000000000000000000000000000000000000000000000000000f08
Bits: 207fffff