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: 66
Hash: 7b041975b0456db6f5430f66097b42bd4889138be00ca6a92e1c7e64e752035e
Previous block: 2dc2fb0762d193e83c61df63cd5f8519821247c1b14f1f9e393acc52007cbaac
Next block: 32057c3414d2b559fd7b96b27f449e14bc3367cb3c28666baa37d7cb1e500aac
Weight: 868
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701597878
Stripped size: 217
Size: 217
Nonce: 2
Merkle root: b0bc79aa366fb41b02bd360dec59f0db29e52979652ee794f89ef2cdf4cc2d88
Median time: 1701597877
Difficulty: 4.656542373906925e-10
Confirmations: 2178
Chainwork: 0000000000000000000000000000000000000000000000000000000000000086
Bits: 207fffff