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: 634
Hash: 5e5bee6fe5ca679a1188a5c4755f6882ff836ea85ee6604d6834d7422a5cc528
Previous block: 63ed97395d2b5a4922e8763435f4f8b187238f4bb92b8d63e1a36051b4d1c03f
Next block: 68fec1b1d29021a88d4ba825fb71aa7161877fae5b8a40d022bcd7c5f440a26a
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864249
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 012d72313efd0cb19d189101ae4abe13688d67798672d69a5caf9d592030d728
Median time: 1701864248
Difficulty: 4.656542373906925e-10
Confirmations: 1610
Chainwork: 00000000000000000000000000000000000000000000000000000000000004f6
Bits: 207fffff