Good to know! Some websites indicate these need pollinators, but I’m a novice, so can’t confirm or deny!Apricots are usually self pollinating , Euro type plums also (think prune plum ) A few Asian/American plums also self . Shiro is one . No experience on Asian pear .
FWIW my in-laws grow some Asian pears. Delicious fresh, but seriously sweet and candy-like when dried.