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: 513
Hash: 7d697c1ac36c5240cff0b665f807e8e99925ba7f275437b94bbe641068959895
Previous block: 1bebd36c250651bbddcf737cc9ed46c7cdac110af657984ece76dbe78cb2c9a9
Next block: 7b3f0defc8c99b8cda0d9810c6417b8fa022d2f6942449e41030ef85fbcd9024
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864229
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 93c3151bac191f15a479a8b3bb64b63373cb01568bca81179577b045f928b3a3
Median time: 1701864228
Difficulty: 4.656542373906925e-10
Confirmations: 1731
Chainwork: 0000000000000000000000000000000000000000000000000000000000000404
Bits: 207fffff