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.

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Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mxMfLjAez

Height: 166
Hash: 251708b46785251e1061c2db9d03e0f5b0e7b47166c2cc451904e507522087eb
Previous block: 6a7e7e536fd902054459029b6fe001571ee518c4ce865bb5cf20258312acb21c
Next block: 3da36bbac4d84f85ae76d9429bcbaaa07c425a07062a445c68e7dd1ebbbdcce5
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597895
Stripped size: 218
Size: 218
Nonce: 1
Merkle root: 97009e7149b5d2a65f4435e3b8d42169548104ef37f38019158cc29a6f3ef7fc
Median time: 1701597894
Difficulty: 4.656542373906925e-10
Confirmations: 2078
Chainwork: 000000000000000000000000000000000000000000000000000000000000014e
Bits: 207fffff