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: 1820
Hash: 7293d713088ca29672070b6eb966c90cd78104bf37767a0f77bd0c5912615697
Previous block: 742b8a93aff9f808f93f5acee30b9658631e1236145cd29f9339a162df445425
Next block: 61531cbca507c72c974a2c725eab11a74f2de54947c180b0dc8c71f442b081f2
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159227
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 6d3d54f30a5cb880a60ef6ee6c74663c9f58fdaedf1dd0d12162b0aeacc4e4f6
Median time: 1719159226
Difficulty: 4.656542373906925e-10
Confirmations: 424
Chainwork: 0000000000000000000000000000000000000000000000000000000000000e3a
Bits: 207fffff