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: 249
Hash: 01ca77f1c329c6684ee9b0ce16e6075f66e544db555f3428f8e835f95a5d0909
Previous block: 1129587641e6622ba3c9f650d8fd547948601ca8b6514ab617c94a753940299f
Next block: 6660a2aaf9c1f1f6fd06ee8bfb0358e4e2d83aa4bb1d6f758575a82f558337e3
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597909
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: 3c982f651c0879bcedcca0a920a5a770783949f7669cbd4430c51cc3b77ce9d2
Median time: 1701597908
Difficulty: 4.656542373906925e-10
Confirmations: 1995
Chainwork: 00000000000000000000000000000000000000000000000000000000000001f4
Bits: 207fffff