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: 316
Hash: 0e810852399c7c517bc4ac90c610ecc6d977c1b82ffb5b51e47640eeca9770ae
Previous block: 63741df77e826d8bf68debb44653ab44ee82c4821164f4fca2114b0f9f1dd355
Next block: 38d7ff40b1b94aa60c0311e19b76d1331ba93b69c966803ae3b8346ed8cb975b
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597920
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: 7e69848ed0ce5bc06da0ccda363cb2c3ade7ed4970c6a60d7d8fc47f93bc3e44
Median time: 1701597919
Difficulty: 4.656542373906925e-10
Confirmations: 1928
Chainwork: 000000000000000000000000000000000000000000000000000000000000027a
Bits: 207fffff