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: 1604
Hash: 434806ab003b3228ee6dd7e2343275ba7e03b4867473b43417d5f6fc55059e9a
Previous block: 6594e8a5b8891d3908d8221eb357da8e78c637d3aebc154dffcc33f6d8db82e3
Next block: 2873fda5b3d1fa981edc93bf7dc46da52dee13b9006f2943f6cf8e00c66bdd13
Weight: 908
Versionhex: 20000000
Version: 536870912
Time: 1708932137
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 94ae9ca19b80cbe6abfcad1641c76f80cb1ac3fc1d68af9179204407e77dfcf3
Median time: 1708932136
Difficulty: 4.656542373906925e-10
Confirmations: 5
Chainwork: 0000000000000000000000000000000000000000000000000000000000000c8a
Bits: 207fffff