What does IFS say about Bipolar I?

Hi all,

I've been doing IFS work with my therapist for a while now and I'm having issues understanding my bipolar disorder with psychotic tendencies. I understand all parts are "good" and that bipolar parts can be seen as firefighters but how can I have positive regard for something that feels so unnatural and outside my true self?

Bipolar is incredibly destructive in my life and I am rebuilding it after trauma from a psychotic break during the pandemic. It's though many of my parts are constantly fighting this sickness in my brain. To say bipolar is a "part" almost feels like IFS is saying cancer or diabetes can be a "part" as well.

Any thoughts?