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: 306
Hash: 6683dc308c16f6a6e7ab62c1f182b622869f53166ea3bb61d47108e948032990
Previous block: 565366d1a33353ae2ae47fa91ff1c79c9940a577915a8f05e8e97b3136ac1a67
Next block: 3b2907737239be0009ea5058aecdda5c3113bc6e2dd1d1f5cbace19283f002ed
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597918
Stripped size: 218
Size: 218
Nonce: 1
Merkle root: 9cb1f66d4f04fc81508d85ab9635a418f2b9177780b3e571b504cc8fffea0511
Median time: 1701597917
Difficulty: 4.656542373906925e-10
Confirmations: 1938
Chainwork: 0000000000000000000000000000000000000000000000000000000000000266
Bits: 207fffff