I find it odd that searching for a block hash on the returns no results; it appears that it's only possible to look up blocks by height? For example, https://3xpl.com/zcash/block/3100354 has block hash 00000000000254f749f516108eb90f18a629688dcd7c518c0d0ad7d209183b5d but searching for that hash in the top search bar returns no results.