"Most" have received pre-arrival already? How many do you know to come up with that generalization? And "some" PPR already. In about 120 posts you have not mentioned the PA's country and you can keep that secret but, all I will say is in reading on this forum every day I don't think I have come across even one applicant from any country who applied in March and has received PPR. Please point to any on this forum where that is the case, because it would be a bit surprising.
The posted processing time on the IRCC site for outland spousal applications is 13 months. Until you hit 13 months, you're within the range. What "advice" do you think anyone here can give?
I am returning to edit this post, having seen what
@armoured just wrote with an admirable economy of language I failed to display. But, more bluntly, at only 5 months, just chill.