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: 378
Hash: 0b7b8a8a98afecdccd047f86178ddf91af433536dcd4878f8423f9517e4b5b6d
Previous block: 4c078e5bf571b7518d9ff2c818e9ccefb32aefded4db038b4da089266022b5d3
Next block: 6a4f877fd2169dad81c4536d9f15105c8521532e298763f7b90627b5bd93ef9d
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597930
Stripped size: 218
Size: 218
Nonce: 1
Merkle root: f07a888d3b27fa885d15bd0c2a8ed44dc61bda20364b244f5b3fdbf45f1b80ad
Median time: 1701597929
Difficulty: 4.656542373906925e-10
Confirmations: 1866
Chainwork: 00000000000000000000000000000000000000000000000000000000000002f6
Bits: 207fffff