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: 672
Hash: 553f90f2cc84443a77684c331fd9cbbc50b9534d2a31120a8a6c17d2427ce760
Previous block: 58c7dbbd706a84d2ab4bbcc386eba98d65e29d1b596444e0f44b43c6106c966a
Next block: 56d3ef977b6d2bc5ef77ed34f3262d6557e2a9bf303d228b04bba3e43841e175
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864255
Stripped size: 218
Size: 254
Nonce: 3
Merkle root: 8613172e3f945b065892993e44572574430a779c1e3ab0ea996f415122d7f807
Median time: 1701864255
Difficulty: 4.656542373906925e-10
Confirmations: 1572
Chainwork: 0000000000000000000000000000000000000000000000000000000000000542
Bits: 207fffff