A book I read has the following perspective fwiw.

When we have been hurt by someone we feel they owe us. We want to be made whole, and we resent them for not making us whole. We miss what they took from us and we want it back.

To help ourselves forgive, according to this book, we should strive to make ourselves stronger, more whole, more recovered, more healed.

The stronger we are, the more whole we are, the less we resent the other person for not making us whole—for we are making ourselves whole.

The less we resent them, the easier it is to forgive them.

And so, according to this book, your own efforts to heal from narcissistic abuse—what you just said—and anything else you do to find healing, and to make yourself whole, will help you in forgiving the person/people who hurt you.