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: 2640
Hash: 1b8dda14ba9acdd96f40037f36a693c89c3e76490cefd402b5dddf462a6baa74
Previous block: 5358a33ecab748961b267531d8b9b441a147b412b73dc659d91e31c283dbdff7
Next block: 02fc0b904559c9331b54332b3573fbb5947e9a23867cc76fcd38ba39dc8463cc
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1743847327
Stripped size: 218
Size: 254
Nonce: 5
Merkle root: 54853d2dc536650e451073b81c04a39851e9479fdf3738a879a3f7e52c325156
Median time: 1743847326
Difficulty: 4.656542373906925e-10
Confirmations: 3
Chainwork: 00000000000000000000000000000000000000000000000000000000000014a2
Bits: 207fffff