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: 488
Hash: 1a2a8ac1c50519f37f183101eb8891720d4e2e1a71e26b579db24bf4aae95570
Previous block: 739a1d7af8f897c6c3517c87440b54e51efc28f156a251ebc2d827cb9a841426
Next block: 1ebfbb1966085f6130f0005bce1f63490b2a1982dc74e58900f2300f35c650fb
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864225
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: e867640ccea07d7afe7780e96f46c21479caf8d889d2a594949f495b88793f3e
Median time: 1701864224
Difficulty: 4.656542373906925e-10
Confirmations: 1756
Chainwork: 00000000000000000000000000000000000000000000000000000000000003d2
Bits: 207fffff