My partner is supportive of me just as I am supportive of my partner

Reciprocity rarely looks like matching. One person supports by solving: insurance renewed, appointment booked, problem removed. The other supports by sitting there and deliberately solving nothing.

Both are load-bearing. The trouble starts when each keeps score in their own currency and concludes the other is doing less.

Worth knowing which one you're fluent in and which one you're being handed. A person who books your appointments is saying something even if they never say it. A person who only listens is not doing nothing.

Mutual doesn't mean identical. It means neither of you is permanently the one being carried.