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. mkrgsKuFE

Height: 1606
Hash: 367b9395e7db5e7d4a68c245f690390507c6abeff1e234b5e5352b2ae7c86ec7
Previous block: 2873fda5b3d1fa981edc93bf7dc46da52dee13b9006f2943f6cf8e00c66bdd13
Next block: 5c60b479ecff7c0d5cb296d2af5967194cbec63e859dd8e9463aecd4c5d1339b
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1708932137
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: f5fea91e22a75e0d0a9d28b248a9ec2ef463aeffbbd05b926997f6dd1017ac30
Median time: 1708932136
Difficulty: 4.656542373906925e-10
Confirmations: 3
Chainwork: 0000000000000000000000000000000000000000000000000000000000000c8e
Bits: 207fffff