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.

home    blocks

Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mxMfLjAez

Height: 2620
Hash: 75809d7f3db5a7ea5ae1ff39145e620070d9fe7ed7f48967f1facf6dc6661a9b
Previous block: 316fb10daa54e2aadb30cba20c9b7efb16c76046a71d5ba60352db8e4334691a
Next block: 6cecac2debd98c3e7a0b08913ee1d07fbe61760bbb5fd7b84b0b1ea20c8a3382
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1743847323
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: d5c3f16a1f286f55dbfd6dc6ce7d49a2ed8026c0db125a4bf04f1beeeb3af42c
Median time: 1743847322
Difficulty: 4.656542373906925e-10
Confirmations: 23
Chainwork: 000000000000000000000000000000000000000000000000000000000000147a
Bits: 207fffff