Tell me. You plants the taps right?
Facing downwards. Even if there's a curl in them facing up. They'll still push themselves up.
So, been you only partially germ it takes up to 3 days to get a tap and then you get a quick 24hr r so pop.. so, if you didn't have at least .5-1cm or more even taps then. Be patient.. if nothing has popped in 2 more days. You should crack them open. And see what's going on. If you see one pop the other should follow soon.
So 5 days. 3 days germ and 24-48 hrs before a sprout might pop..
Good Luck.