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: 254
Hash: 43a4cd73d7153577252bba3834881e79a5eb6a1646012461b6c04bec4c634956
Previous block: 4eaa79686196962a0886f2ad7a5b37e62fd3b78f7b47ab0e0dea5becbe7b734c
Next block: 7f49c97df477ba63bbd56acc0c64e9b182f48e8a051f8e8b842f60d6688aa689
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597910
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: e2cd34833657522917cffa7ae9b899dea10266cee05452c36967300cb35afb7f
Median time: 1701597909
Difficulty: 4.656542373906925e-10
Confirmations: 1990
Chainwork: 00000000000000000000000000000000000000000000000000000000000001fe
Bits: 207fffff