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: 731
Hash: 2f375d57eb581b1a2417598c9e152fcb5b92349678858328e39bdd4d589e58ce
Previous block: 3dc72ae46904734d4e66999fe60a7b350f4009e5ed991c17820f72e940b62d1c
Next block: 748373dc7e99796dc5ddd6f030fbcc7740ef9eab4d5720a991e19b11c36d5d00
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864265
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 604d1348be9d7730f53498d63d176fae68bff7b500c438be34a37abe24c3ed30
Median time: 1701864264
Difficulty: 4.656542373906925e-10
Confirmations: 1513
Chainwork: 00000000000000000000000000000000000000000000000000000000000005b8
Bits: 207fffff