If you edit the price of your subscription to a higher or lower amount in Thinkific while using Thinkific Payments, you have the option to apply the change to new subscriptions only or to new and existing subscriptions.
If you edit the price of your subscription while using Stripe, the updated price applies ot new subscriptions only. You need to adjust the subscriptions manually.
For more information, check out: Can I update the subscription price for currently subscribed students?