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: 318
Hash: 11afa212ef4fe1f6a1bfca3f51ea05984f453a56b0eb07df5d0ccb346d6405b2
Previous block: 38d7ff40b1b94aa60c0311e19b76d1331ba93b69c966803ae3b8346ed8cb975b
Next block: 424739d460667ce5ae25cdd5012d3fdf6a02cb491a77928122cf716f7c13daae
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597920
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: e5aaa7f905dabd78bbbf6dff0c7f2072d9672d8e52f25249492b555a94706c38
Median time: 1701597919
Difficulty: 4.656542373906925e-10
Confirmations: 1926
Chainwork: 000000000000000000000000000000000000000000000000000000000000027e
Bits: 207fffff