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: 156
Hash: 64de0832532565470a03801753f73ef84f39751ee9328c53adc9cef228609771
Previous block: 512da69d978a9825f522666297cbfe57fd1d92fd28971d7a38a60bab0667d2d7
Next block: 4eaa10ff9872504d244a79313b68147d29832c8d9f988a4096c6edd49e38edeb
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597893
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: f4030f17d338f8a6452687e61f0eb9c22d15f2c3dfa1c65933e5c852e25d81ce
Median time: 1701597892
Difficulty: 4.656542373906925e-10
Confirmations: 2088
Chainwork: 000000000000000000000000000000000000000000000000000000000000013a
Bits: 207fffff