That looks alright for the moment but the newly hatched baby shrimp are so tiny I imagine for the first day or 2 or 3 could slip through. A sponge would be better. I use small Fluval Edge pre filter sponges. There is a 3 pack available for more like the price of 2 individual boxed sponges. There are some similar types available in bulk from sellers on Ebay and possibly Amazon. Cheap, but the ones I got from a friend who bought them lacked the firmness and would clog and cave in frequently after a month or 2. There was a thread about these types of bulk generic prefilters and one persons experience was that theirs were stiffer and more rigid than the brand name.
So it is the luck of the draw I think.
I have also used the sponge from a intake style sponge filter - vertical style, was much larger and I utilized it as an additional home for BB, so cared for it as one would for filter media.
Often the shrimp will molt when in new clean water after having to travel. Therefore be hiding for a few days.
One way would be to check them - withhold food for one day to a couple of feedings, then see if they come out when the next feeding happens.
If you decide that route I would wait a couple days to see if they come out on their own first.
EDGE Pre-filter Sponge | A1387 | Filter Media | Fluval