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: 140
Hash: 64ce7e489eb5e4c901d403fd9e7d8d632c65d054b487e9a1aedae8118f7ef973
Previous block: 6005086660605e00952eb22dc02b194368943d806fece987e5fb3f37c002551f
Next block: 76f94091ac1ebbdc3d0a4f58658151084d788ab8230c7f8db3c2352d643c05e0
Weight: 872
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701597891
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: 56da32161500919cf2f35a9d61ee09e6bdd05fc93bd1a88743226c5925ad48a9
Median time: 1701597890
Difficulty: 4.656542373906925e-10
Confirmations: 2104
Chainwork: 000000000000000000000000000000000000000000000000000000000000011a
Bits: 207fffff