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: 1579
Hash: 0157e6d0d4d058cf353912d7a3cf22e4d697c620583d9aa381da409722368a49
Previous block: 202fc7f705c97ebbaaa56d8150f596234f3c7b705efb94b63330d06c2d946ba9
Next block: 76b9bede89331c9ceb9ff9ce7bd701c442df8bead52e939d65495efb5a9b79dd
Weight: 908
Versionhex: 20000000
Version: 536870912
Time: 1708932133
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: cb7a50d31c8d2918d921a2788bc55b5a3e0576fec5e357af6b574fe8602625b0
Median time: 1708932132
Difficulty: 4.656542373906925e-10
Confirmations: 30
Chainwork: 0000000000000000000000000000000000000000000000000000000000000c58
Bits: 207fffff