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: 21
Hash: 3dccee3c19f969f8221ec286de37237a1f9931069827f45dd1c9edb9520bfccd
Previous block: 4800bb73fb0c92ccb36ab2068ea94112ccffe296a48940a034e0bd17d6dc9f5d
Next block: 13a1b9e2d42ee5a48437eafd975aeb08d5822925e62aacb911d6723517cd12fe
Weight: 868
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701597871
Stripped size: 217
Size: 217
Nonce: 0
Merkle root: a285856233f8f226dd91e89d2f206defa262cc60b5bcf814effd25e44928150e
Median time: 1701597870
Difficulty: 4.656542373906925e-10
Confirmations: 2223
Chainwork: 000000000000000000000000000000000000000000000000000000000000002c
Bits: 207fffff