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: 150
Hash: 1c811f7778c454e09f820cf278758194feab5541d559984f58a02e75513eaac7
Previous block: 5e56cd2e58c3656b2eeecb304c77dd178029f3492e5835015aee53d36e200ad4
Next block: 1d1907a426b129a6fc0d6681820bfd14272066f6f7fb47972e7cba05b11d7476
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597892
Stripped size: 218
Size: 218
Nonce: 1
Merkle root: 9e08443904b6c3a96d5496295127f9383a5f5d736c878efaccb63c88a77c554f
Median time: 1701597891
Difficulty: 4.656542373906925e-10
Confirmations: 2094
Chainwork: 000000000000000000000000000000000000000000000000000000000000012e
Bits: 207fffff