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: 517
Hash: 18b5440cfcca8a6b25d4b7143406b6c70e9c0ce07c2cf589adbda80e0f33fa2d
Previous block: 773d593acb814c80181a4c70b7b8e9ab3b9194af1bb513f09fb6f71155e01ec1
Next block: 151bd3880be8fd859e4cda96ed7a4d9841a3f1b4929eb479446ff6d5d81fb787
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864230
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 5a06b917256d5b9bf31ff0cf444221e797eac20a9c7fc8699983d26fb24c4e15
Median time: 1701864229
Difficulty: 4.656542373906925e-10
Confirmations: 1727
Chainwork: 000000000000000000000000000000000000000000000000000000000000040c
Bits: 207fffff