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: 729
Hash: 186beb815e7d1024176e7cc176ef2c500b6b937d0fee5ef4978aee3b9f4ca7c6
Previous block: 2e0bd1bc801ac0543bab7157cbaab84b074fd777b70b6611fea3e414d797c1a9
Next block: 3dc72ae46904734d4e66999fe60a7b350f4009e5ed991c17820f72e940b62d1c
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864265
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: d97dac810ea7ebb1c9721ca0bee0174259a7f0a6b44d6a412d32a19305a0c2f8
Median time: 1701864264
Difficulty: 4.656542373906925e-10
Confirmations: 1515
Chainwork: 00000000000000000000000000000000000000000000000000000000000005b4
Bits: 207fffff