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: 661
Hash: 5dbbe2238d3ca9d8f8fb88dd13119e8ada7018eb5eeeb81dc545bb00a81a209a
Previous block: 5058e46ce21d49966430ed0961d28041a8dfbc3072f2d64a72f1c11595d28186
Next block: 331dfc82264eb1534a32c66bbb17e69f8712e628d4bde9e9fdc01423f90f8cdf
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864254
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: bbb5f19d06542fa44abe501f1c9851585c9ec7b28c1da56c4f9049860b2d567e
Median time: 1701864253
Difficulty: 4.656542373906925e-10
Confirmations: 1583
Chainwork: 000000000000000000000000000000000000000000000000000000000000052c
Bits: 207fffff