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: 600
Hash: 478ef192d56e018f4e0939dffeb3f7d63a23b48ef0661f6401130cb55f9c544a
Previous block: 7dbe0f9e42ca5abb3f75558119452876f24dbfe61b59e21640c183299f60a095
Next block: 116576fc0d2e7d5672faecc45c9c77d035131b1a32e026c53f76f75e1fb8a383
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864243
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 8292e042851efb8d9edc5801dfab744ea86e16f274f876649639aac96a4a97ba
Median time: 1701864243
Difficulty: 4.656542373906925e-10
Confirmations: 1644
Chainwork: 00000000000000000000000000000000000000000000000000000000000004b2
Bits: 207fffff