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: 395
Hash: 3510a522618afbd3c045165c0327b8cba5f86da983f62ea64872e1ddd2988fda
Previous block: 0ffcf105781df88b4c85baf2272546f3023334c51afa18a7a78798d68aae3adc
Next block: 382bf261f1f6096141c0c3a774e0eabe0b9257cee17ecb15e952a62753ce48f7
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597933
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: ab2bf76751fa8cb7626a4e9a3f0d7340a462658e2dca04444a920c67abb8f875
Median time: 1701597932
Difficulty: 4.656542373906925e-10
Confirmations: 1849
Chainwork: 0000000000000000000000000000000000000000000000000000000000000318
Bits: 207fffff