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: 409
Hash: 616349d017c3b35aaa173177d2548b93c14f4f5b7f5908ee639bdbbf09bc9908
Previous block: 412df374cce2b50e3072e9bc1d7d72705346d8d67ee74a8e6721c1614c354925
Next block: 76b9d75cf031557cb20bf386444335ceb0b12efc8ee69634bb9ff2febd179735
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701864212
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: 6b362cdb9878221bd86a44b52ff25cec1061a1aee42f76a5e3cec0219eaf402d
Median time: 1701864211
Difficulty: 4.656542373906925e-10
Confirmations: 1835
Chainwork: 0000000000000000000000000000000000000000000000000000000000000334
Bits: 207fffff