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: 543
Hash: 64750ed45d4cad3683b5293f49dd9adb911e495b08aa193d961a28aeec7757ef
Previous block: 6ba9934c158b8cfc76f6127931e8dc4258f2b733d41ebf0be079f7fce134a1ce
Next block: 27d6695611c72a007788bb9763090756b4988748a08d114107a03a19d6b65ab3
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864234
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: faeedaaf1b7c18c755db8a80a6a710e7cbc163fbf02a413436f4103f28438e7c
Median time: 1701864233
Difficulty: 4.656542373906925e-10
Confirmations: 1701
Chainwork: 0000000000000000000000000000000000000000000000000000000000000440
Bits: 207fffff