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: 1690
Hash: 51ed509f4be448e3c4a03654710973f56df38be91993786997f15caaa4de2218
Previous block: 0ead3d89590de22b8e8419da735cc52cdf62fe934837b09e92d2e33bbf49ab32
Next block: 4b653ea8ed9335386bf85ddfb4ec0ec9634e3ec7de692559f9fd7cfceb30cbda
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159205
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 14bb8c3fb79309337d1698058c9b4b5d8bca09fef23d6d38318b2258c16844be
Median time: 1719159204
Difficulty: 4.656542373906925e-10
Confirmations: 554
Chainwork: 0000000000000000000000000000000000000000000000000000000000000d36
Bits: 207fffff