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: 53
Hash: 10f1919fc3dc9cf8ff41c222e988f8ffbe2a5071ef798480a3edcff786f76818
Previous block: 1751b721f63c1755c9f65580be8b9bd08dd018e8306a5a2d772e9e5ab43edf25
Next block: 7bc825f93c1d316a7b24cd1b1e10e3965751d78c5e381f25bbee6b9ecb649822
Weight: 868
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701597876
Stripped size: 217
Size: 217
Nonce: 1
Merkle root: 21ec03da8af0438e17bf76620d2ca2090d6b26804c90747d6070a7c3c61cd1ab
Median time: 1701597875
Difficulty: 4.656542373906925e-10
Confirmations: 2191
Chainwork: 000000000000000000000000000000000000000000000000000000000000006c
Bits: 207fffff