Hey @AngelaSchirck
You can enter an expression and show that field as having data when meeting a condition, I haven't found a way to conditionally enable pop-ups if that's what you're mentioning.
You can use this here to find the count, and this would match your specific use-case:
var <your var> = $feature.<feature name>;
if (Count(<your var>) <= 10) {
return <your var>;
} else {
return "";
}
You can hit "Select fields" and then "Add expression" to do this. I would disable the viewing of the original ID and give this one a similar name for use!
Hope this helps!
Cody