Let me know is there any way to find the pattern count after creating fill pattern in ST10 (not manual counting)
only if this is a hole feature.
If this is the case, then You can use the Hole Count feature of SE.
See picture, and use the %QC (Quantity Coplanar) to show the number of hole counts.
the hole pattern You see here is a rectangular pattern of one hole.
For the Quantity thee is no rule how they are created.
Only the number of holes is counted, but not depended on the creation method.
as shown in the pciture above, You can use the call out text %QC or %QP or %QA to get the number of Coplanar, Parallel or All holes of a type
And You can use this in the part document and/or the draft