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: 691
Hash: 28c9d3170344edc8cd103586405d3103b5f5895978927a5b524483bdf79c843d
Previous block: 67c86ebbe5954ceb5d84fd8e7ceb11b0fce40848cd3f05f33f8201103f0b03f7
Next block: 152fea46971cc20404c254f4e2158a0a1da461e109acdab8edbf1eb75893bc0c
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864259
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: baa707cfa762331b5be39b14a8157ee2bc76b8ed6d60e44fc04e07b48d321d9d
Median time: 1701864258
Difficulty: 4.656542373906925e-10
Confirmations: 1553
Chainwork: 0000000000000000000000000000000000000000000000000000000000000568
Bits: 207fffff