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: 344
Hash: 42f91f6412dc02cce6a550474a324940345acdac60942eb32f889b529d203e5e
Previous block: 6ce95c432a9aded74bfdc76502d8424f63a51bc09b35e4a4d9111e80f8e1afa4
Next block: 47a50cef1eada1b0de3a2813c6e207fec2f0cde3d0617fa325a498798328dd6c
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597925
Stripped size: 218
Size: 218
Nonce: 1
Merkle root: eae6bfe21cb964f622d8a400047a0252b88dfcc6e9d4324314b276054e56b1aa
Median time: 1701597924
Difficulty: 4.656542373906925e-10
Confirmations: 1900
Chainwork: 00000000000000000000000000000000000000000000000000000000000002b2
Bits: 207fffff