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: 420
Hash: 41876e61ea4da454581b76b7a7c969364d4e0032b3ff96de09949b22092fef4f
Previous block: 722efb8466c271676290531d5aefefedb09c2df9e8b8ef58fa5168e582854533
Next block: 17d3f4c89bacd1db24176043cc5237f6faec40873cf7d6268ba943cdb9b857de
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701864213
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: eb410ed9af1c5701ff3c31bb1b16f274d0a8ff3bfa54975ad5e6b3832ef49324
Median time: 1701864213
Difficulty: 4.656542373906925e-10
Confirmations: 1824
Chainwork: 000000000000000000000000000000000000000000000000000000000000034a
Bits: 207fffff