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: 232
Hash: 44f4b50f99a20506c14771ceb3fb2844aa5a3b94ad95487a22d8dcd68fafa91b
Previous block: 0989ae307ca21b1f67ee71201f14045c8e5092583cb9f0f728f9cf3efc93c5d6
Next block: 42c094760e9331d3f865c6b91b7b476404e0e604d7f8c5587ed9362dd585b8d1
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597906
Stripped size: 218
Size: 218
Nonce: 1
Merkle root: bec39ba8f5abe6c82db5acd2a2c36f6c61472606e6e71e658dd7a27e049f3375
Median time: 1701597905
Difficulty: 4.656542373906925e-10
Confirmations: 2012
Chainwork: 00000000000000000000000000000000000000000000000000000000000001d2
Bits: 207fffff