There's currently no way to filter for the labels in the Remarks field within Wildlife Insights, but you'll see these notes when you download the data. If you'd like to tag these images in a way that allows you to quickly return to them, you could use the Highlight button and then filter for highlighted images. One thing to note is that any images that are highlighted may be shown on the public Explore page.
I'd encourage you to submit a Feature Request
for these filters if it's something you'd like to see in WI! While we can't build every request, it helps our team to know which requests are the most popular.
Wildlife Insights team