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: 509
Hash: 26bf6b310f434a3d2f4e88536ef0a0cfd4a1fc8c4a8a738c71629a84346da907
Previous block: 440c7cf91650b9786b4476acccb1cb90351acb6f6d2d0d6d41624907d18cb213
Next block: 211752c3f3de5ba21273743be8af52d4d12da44c88d157c30569ba7939a70432
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864228
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 9d43023e6241489e186e675c9ea9486e4ce2840f6c646481e1f863b84a977869
Median time: 1701864227
Difficulty: 4.656542373906925e-10
Confirmations: 1735
Chainwork: 00000000000000000000000000000000000000000000000000000000000003fc
Bits: 207fffff