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: 615
Hash: 42c8e55f3c18b397ad3053c67883a57fd6de24650b69ae7fc789acb18b911fa1
Previous block: 0f3b51e54426baa2eeafe87bd04d36364da351e763ab891fd3bd8528596578e8
Next block: 0c3753e4e0f16ee1a38986868971c44ba53a7a996002bff4cd0ce53afb33f2e6
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864246
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 129bb3372155d162d29f788077fa761b57d3ddf813cce97c4d50e111eac8f141
Median time: 1701864245
Difficulty: 4.656542373906925e-10
Confirmations: 1629
Chainwork: 00000000000000000000000000000000000000000000000000000000000004d0
Bits: 207fffff