Yes. When you cancel your Foxy subscription, all your content — characters, gallery, generations — stays in your account.
What stays
All your trained characters
Every image and video you've generated
Your unused credits — they don't expire
What changes
While your subscription is paused, you can't spend credits — that requires an active subscription. The moment you resubscribe, your credits become spendable again.
How to come back
Open Profile menu → Change plan, pick a plan, and confirm.