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: 578
Hash: 02b2351fa08de83f8aba64ec82117f571627863d6638f63d906f567a42c27239
Previous block: 7e81719c7369b6e414a55b9bbe054ef1b5d0e4c7157f527895bab8454eac63e4
Next block: 15a4eb8a3b90d9b9d96a6f3dd7b9294c9c3ef48cf601ef6b80a8f4bd85397699
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864240
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 5989358e13a0e2f2dad2a3ee1179f52e02494c03297864db424180bc62e63efc
Median time: 1701864239
Difficulty: 4.656542373906925e-10
Confirmations: 1666
Chainwork: 0000000000000000000000000000000000000000000000000000000000000486
Bits: 207fffff