Many apples respond biennially, flowering heavily and producing good crops every other year. Honeycrisp is known to be one that has this characteristic.

Thank you, so I guess that Honey Crisp is not a good pollinator for Pink Lady, or at least not good every other year. Time to walk the neighborhood and see if anyone close has an apple tree so the're maybe hope for the Pink Lady. Will do more research on the two varieties.

The pink lady might still have some flower buds that need to open.

Grafting a few varieties of apples on each of your tree will solve pollination issue. Fortunately, apple is one of the easiest fruit tree to graft. Many good grafting tutotials on Youtube.