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: 260
Hash: 2dc02add355135b799c9b9316b56783fa9c31b5c474627ba744048ab0f7bcc44
Previous block: 6af385c604714936d4d2d41e3c42b50576e24c8b38453abe43a3fa878b4c4960
Next block: 54e551e1486cb219da2416d8dc71a25c69dea8c7075ddd6b33821e433295c04d
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597911
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: 4ebd5fe57d60427daf670ec03adef116fad526bd0ed8538ccff1106b8ee54b9b
Median time: 1701597910
Difficulty: 4.656542373906925e-10
Confirmations: 1984
Chainwork: 000000000000000000000000000000000000000000000000000000000000020a
Bits: 207fffff