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: 321
Hash: 04051b7c8663569100e67d04ec670a892d4f84c2af030106f1cca53473288742
Previous block: 26b7c868e0c7794706825a5f1619878429c4431462e7dd8ad0ec21866210c671
Next block: 3a6dc270f35086fa1ff414aeabca25cb72cf586df1c6f6bae85c54362a6abff7
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597921
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: 7ec188f6cd947c39103828eb5ba3566daf94e8e439540b354a9fa9da9cf5b6cf
Median time: 1701597920
Difficulty: 4.656542373906925e-10
Confirmations: 1923
Chainwork: 0000000000000000000000000000000000000000000000000000000000000284
Bits: 207fffff