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: 656
Hash: 3757497a7f16cbf4a843f4a76e39c21100f4d567ef0375523f13377b179d7b50
Previous block: 18aa482b399bc71f01745559272db7caa1d19683b2dfc55d9aa85e4405809253
Next block: 397552b636f3636f529a7d55919e3f5134be98e2b03af4db4099b6065c32f14f
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864253
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 17b834330f4ec54e8fab00579d3410c23a2689c42152c816f4f06d94e98bd232
Median time: 1701864252
Difficulty: 4.656542373906925e-10
Confirmations: 1588
Chainwork: 0000000000000000000000000000000000000000000000000000000000000522
Bits: 207fffff