Difficult to say with any significant degree of confidence.
Where Ancestry assigns a match to a particular parent’s side I have found them to be reasonably accurate but not 100%. There have been a few of mine assigned incorrectly.
Irrespective of Ancestry assignments I have been using the custom Grouping option where for my matches where I have high confidence in them, Pink is Maternal and Light Blue is for Paternal, with matches that are linked to in my tree having the Star.
You are doing exactly what I do and sometimes it goes nowhere and it then becomes a waiting game.
I have written about it before but I have an NPE in my tree that took a long time to resolve, all because of a high cM match. 9 months ago another match of 178cM was displayed and via messaging I learned of his cM value that he shares with my own highest match. What this boiled down to was that he had a close NPE in his tree that could be either their Father or more likely their Grandfather not being a biological relative, I have not the heart to tell them.
So do not discount that whilst all the documentation may exist there may be an NPE involved in your matches family.