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: 1588
Hash: 0cf9fea9d5c1d586de8f8eb03906dfe8ba4aaa7feefdc16fd9f65487e09991f9
Previous block: 607c605844567fcc66925418b68f94048b9dead13f984a8748f53bf94056ea05
Next block: 00b768867f1cb0fc3215545ee8637d131e3e5f7a07f88014143515f76c1f206a
Weight: 908
Versionhex: 20000000
Version: 536870912
Time: 1708932134
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 56996725e45347f14b98609ec44c09ebe26741371545a9a32c31dbaaa04bb337
Median time: 1708932133
Difficulty: 4.656542373906925e-10
Confirmations: 21
Chainwork: 0000000000000000000000000000000000000000000000000000000000000c6a
Bits: 207fffff