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: 1805
Hash: 685b1a392abc470b80d8959e234cd564863a57066c0339e6ec7697be4b23c592
Previous block: 27135c3e1479fcf251fe682afa78ada08b56e3eb7aaa6cc963d926134496f740
Next block: 6a80fba197d35e6162900829a56d8bea214be149f5d1875ca88e7d2b2d060bb6
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159224
Stripped size: 218
Size: 254
Nonce: 4
Merkle root: 21bf9a01443422f3ef45f5e43a1470fbac37ba4dd2ce4640af6493c6ed45d91d
Median time: 1719159223
Difficulty: 4.656542373906925e-10
Confirmations: 439
Chainwork: 0000000000000000000000000000000000000000000000000000000000000e1c
Bits: 207fffff