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: 872
Hash: 0412f75e59938c1b48758800f349b3688e1309cf0c3d2e6dbf3e63348a7d446c
Previous block: 4f3c17cfa718a82c4db32424bae47c544df7fb12ba2a0e7fc51ba9be782077c9
Next block: 0f897afb31e7233aeabcb361a50a6487a4fee2725aebf1141af0a9be68f3208d
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1707857814
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 28eacf5b9cdf824e3f5fb007ae78a605578f161fadec24bdaf681735eea58eff
Median time: 1707857813
Difficulty: 4.656542373906925e-10
Confirmations: 1372
Chainwork: 00000000000000000000000000000000000000000000000000000000000006d2
Bits: 207fffff