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: 580
Hash: 6686f213a76ab85e96a56c2f5a935a7050828c6d50f3252fc466489a4e68ea9e
Previous block: 15a4eb8a3b90d9b9d96a6f3dd7b9294c9c3ef48cf601ef6b80a8f4bd85397699
Next block: 2dfb9d0de28ce43035979e480bc056ae9e859e5f92cd87342fe372e410417429
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864240
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: f2b574eedf2c914708de3a04e8e500b2a6542524faea00b1184fcd75b5428036
Median time: 1701864239
Difficulty: 4.656542373906925e-10
Confirmations: 1664
Chainwork: 000000000000000000000000000000000000000000000000000000000000048a
Bits: 207fffff