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

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

Height: 1605
Hash: 2873fda5b3d1fa981edc93bf7dc46da52dee13b9006f2943f6cf8e00c66bdd13
Previous block: 434806ab003b3228ee6dd7e2343275ba7e03b4867473b43417d5f6fc55059e9a
Next block: 367b9395e7db5e7d4a68c245f690390507c6abeff1e234b5e5352b2ae7c86ec7
Weight: 908
Versionhex: 20000000
Version: 536870912
Time: 1708932137
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: d7f213432e04df609f6eb6b4d2cdee47ef7e2d1d175b819fd9b334f6c3651fa2
Median time: 1708932136
Difficulty: 4.656542373906925e-10
Confirmations: 4
Chainwork: 0000000000000000000000000000000000000000000000000000000000000c8c
Bits: 207fffff