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: 76
Hash: 564f16bf5ac031ad7917b34e0f158c4340f2390b26cf7e6ae7e1c7ccae847559
Previous block: 3ddbdddd0d0ef65a8da77f4593b839a0596d2945cf7d28858fb503041ed8f1d9
Next block: 513e1632a4804341be9efcdf990db2a55800689262990887f4f4f13e2bd1e3d5
Weight: 868
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701597880
Stripped size: 217
Size: 217
Nonce: 1
Merkle root: cd8ba0828de476f1f38e2ffed580f30db4abb8f6e37fe06e11dd62a9e1c7b6d5
Median time: 1701597879
Difficulty: 4.656542373906925e-10
Confirmations: 2168
Chainwork: 000000000000000000000000000000000000000000000000000000000000009a
Bits: 207fffff