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: 325
Hash: 7f56653ef64ae9871cd1399b48d6bd82772482d5ea67da0a60b9d87cf7d650ec
Previous block: 5296c4582496764cb0ae300eb09a24325a47f3c3c3e4fdfcebbeb84045359f6d
Next block: 33bd331f5bdfa01d33f87e30b9e5442247471149330940e15fa672e961e98214
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597921
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: 7bf9b6456145f7f6d297fc56a8ae0a49e56a6a54f07aad1a8b12a9d75c0d646e
Median time: 1701597921
Difficulty: 4.656542373906925e-10
Confirmations: 1919
Chainwork: 000000000000000000000000000000000000000000000000000000000000028c
Bits: 207fffff