how to see how my google ads look like?

I understand there are 2x ways:
1. trying to enter in google search the used keywords and hoping to see your ad is not going to work due to time, my user profile and so on
2. use ads preview
The problem with the latter is that it does not show my ads either. The explanation is either "Your ad is probably being shown at times, but was not shown for this particular diagnosis." or "We don’t know why your ads aren’t showing for this search."
So, is there a way to test always how my ad looks...

how to see how my google ads look like? WordPress ...