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: 237
Hash: 6d158ac595f4b5ee00f8841408837a7e137153823911f7cf60a7224bf0ef3b07
Previous block: 03e60d36af90e3163568cf91dfb76c207f8467282522b7eb37dac68a457c9765
Next block: 73cf1847f8e0a64a9751448e66a2204d64e585ad7b8dee45723e95a0a6d9f8b6
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597907
Stripped size: 218
Size: 218
Nonce: 1
Merkle root: 7ed982ff4dd0cd25293ca9f50ff14ad281280b2548e461feae92564ae0a059e0
Median time: 1701597906
Difficulty: 4.656542373906925e-10
Confirmations: 2007
Chainwork: 00000000000000000000000000000000000000000000000000000000000001dc
Bits: 207fffff