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: 515
Hash: 5276ffcd34e1dae8a3b1c2404ed3dfdd349b1e33be505cd876be9dfc3fb4ca24
Previous block: 7b3f0defc8c99b8cda0d9810c6417b8fa022d2f6942449e41030ef85fbcd9024
Next block: 773d593acb814c80181a4c70b7b8e9ab3b9194af1bb513f09fb6f71155e01ec1
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864229
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: ba051a32aeed7920d772b397ad42ef5991039a76abf364d1a8ac81a081c8310b
Median time: 1701864228
Difficulty: 4.656542373906925e-10
Confirmations: 1729
Chainwork: 0000000000000000000000000000000000000000000000000000000000000408
Bits: 207fffff