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: 253
Hash: 4eaa79686196962a0886f2ad7a5b37e62fd3b78f7b47ab0e0dea5becbe7b734c
Previous block: 3b7467ddaef7f6913efd7160bb607b2491df84e7b7d2c0a4c570e23a7ba26c49
Next block: 43a4cd73d7153577252bba3834881e79a5eb6a1646012461b6c04bec4c634956
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597909
Stripped size: 218
Size: 218
Nonce: 5
Merkle root: 26d0e022872c71276b8ba4b58f626b3e5a065d46e86548d00740d6f6257f687c
Median time: 1701597909
Difficulty: 4.656542373906925e-10
Confirmations: 1991
Chainwork: 00000000000000000000000000000000000000000000000000000000000001fc
Bits: 207fffff