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: 531
Hash: 5d958bbf4db4986da97995505e2108ecbf8531e1b0cfdfa506069e2551d31dfa
Previous block: 787fe9090daf7bf0a7562e3852ce44a6dbcbe824d0ef20979d17741fc5d8ab2a
Next block: 480abac9bb68a9bfb6f5fe85d5ff3b293a934fd6924ae1333711d625abb4279c
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864232
Stripped size: 218
Size: 254
Nonce: 4
Merkle root: c74a37dec8356913bdbc79da8c0a7d471d6c1eac2cebea0c93971cdc4db83631
Median time: 1701864231
Difficulty: 4.656542373906925e-10
Confirmations: 1713
Chainwork: 0000000000000000000000000000000000000000000000000000000000000428
Bits: 207fffff