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: 134
Hash: 257cdf63fd3e1ab9b85422a2225195500bfa9b900d6ac7c920052aac2839b90f
Previous block: 65d72a71d521fb1d2690b1c13f6a80632f3e53efec39bd801e3e55a22804debf
Next block: 7c6e02998c4bf017b7a07445828ec92925d2e79117d4f9395ece9a1376cc23d0
Weight: 872
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701597890
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: 4711f06a6c1307e6a66367a39ec58c9aacf2b22c4fbe24ca41060fbc5ff69250
Median time: 1701597889
Difficulty: 4.656542373906925e-10
Confirmations: 2110
Chainwork: 000000000000000000000000000000000000000000000000000000000000010e
Bits: 207fffff