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 github.com/pdxrod/blockchain_explorer.

home    blocks

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

Height: 523
Hash: 17868de718d895d413d40124f5705ab7d9cee2e66dad85b0cf7d95a1ce3cf6b3
Previous block: 17ca3309159860ea546d2a91ebda640988280dda5c4f92fce1317dde08a55f88
Next block: 3701e86ffb427e54683958f0e4d2eea7f409301c0d1cd77751724163a1fd1f0c
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864231
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: dfd71fd861db2b1cff346a9b4d8dc99d6b304523ad90fa9c156f8ff5ddade13f
Median time: 1701864230
Difficulty: 4.656542373906925e-10
Confirmations: 1721
Chainwork: 0000000000000000000000000000000000000000000000000000000000000418
Bits: 207fffff