Unfortunately, if your Peak Strength subscription is managed through the Google Play Store, we cannot provide a refund from our end. Due to the Google Play Store policy, you will need to request a refund directly from Apple Support.
Here is an article to help you request a refund for your Peak Strength subscription: https://support.google.com/googleplay/answer/15574897?hl=en
If you have additional questions, please refer to the rest of our help center or email us directly via support@peakstrength.app