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: 455
Hash: 6dbdd2084e2754076e1780ad7aae0639316d4d164f24ece80b6dde269039461a
Previous block: 5d4bbf0bd0fe183d78e1afc40af7f6b7c2df9427480208c749fd300ecf7bb9a9
Next block: 3c3d06a296bc25da84c50b0ee8ba9add1d3f9bc52355400e4e78a48aa217bfb5
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864219
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: f00abcd8b5b3f141c20d61cf75df2313d4deeca8ed14a62fd870bca6cbf56a0f
Median time: 1701864218
Difficulty: 4.656542373906925e-10
Confirmations: 1789
Chainwork: 0000000000000000000000000000000000000000000000000000000000000390
Bits: 207fffff