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: 629
Hash: 49f0cd3f75af296ebbc753a0b4246d0657ec576ed56fef830b4413d98d0bc82b
Previous block: 12f83f6427c16ea94ed2ee3f0601d4431e59a50fdc7dae25aac573db094d4a64
Next block: 1830e62c7cc3eea5585077bed28d8b7494963df1a36aafd1597bdbf5757a0b1b
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864248
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: fc950d9cb9dca37aab9723c3d75e8f44ca586adfc28b21e29dffa2d9177bad59
Median time: 1701864247
Difficulty: 4.656542373906925e-10
Confirmations: 1615
Chainwork: 00000000000000000000000000000000000000000000000000000000000004ec
Bits: 207fffff