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: 308
Hash: 2ac3d8852374937d1ff0b78db9d2c8be39ddf0ff607b1cfc461442e453495774
Previous block: 3b2907737239be0009ea5058aecdda5c3113bc6e2dd1d1f5cbace19283f002ed
Next block: 5c1ab652fec4b8eed7539c87efdc0c1fb44b540c36163b5bd3816d96d0516eda
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597919
Stripped size: 218
Size: 218
Nonce: 2
Merkle root: 417341460217d7637eaa5cf1132f80b30aa9f24e3c2665aaa95eb0737e6c1740
Median time: 1701597918
Difficulty: 4.656542373906925e-10
Confirmations: 1936
Chainwork: 000000000000000000000000000000000000000000000000000000000000026a
Bits: 207fffff