In the article at the following URL you made mention of a guide and groups with no guide or link to the guide on the page. This was not very helpful. https://www.gardeningknowhow.com/edible/fruits/pear/pear-tree-pollination.htm I came to your site to try and discover is Asian pears serve as a good cross pollinator for Pineapple Pears but was unable to find an answer due to the guide mentioned at the above URL not being present.
Certified GKH Gardening Expert
I have shared your concerns about the article with the Editors.
I did find that Pineapple Pears have some specific pollinators; Courthouse, Flordahome, Baldwin, Golden Boy, Hood or LeConte.