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. mupBAc74k

Height: 1577
Hash: 27256e538de5d8ffb64e3a0c20dd4e8d738b149feb1dccb4bea1beceaae7a5b4
Previous block: 1cef757d36584801c52b0f109970c19bbc250ff512033360bbf7ddaf8626cd42
Next block: 202fc7f705c97ebbaaa56d8150f596234f3c7b705efb94b63330d06c2d946ba9
Weight: 908
Versionhex: 20000000
Version: 536870912
Time: 1708932132
Stripped size: 218
Size: 254
Nonce: 4
Merkle root: e9e49d205e7f52b82add2973c64237855ebb42c10694e52eed8ca2b633aba44d
Median time: 1708932131
Difficulty: 4.656542373906925e-10
Confirmations: 32
Chainwork: 0000000000000000000000000000000000000000000000000000000000000c54
Bits: 207fffff