Memberstack Plans not Syncing to Stripe in Customer Portal

Hello- We have new subscribers through memberstack and we see them in stripe as customers (with their subscription tier). The tiers, however, do not show up in the customer portal. Now our subscribers cannot switch plans. When we use the ms-data-price attribute + tier price ID, it only shows your current subscription with no option to upgrade or downgrade. We have enabled the "switch plans" toggle in Stripe, but still no change. Am I supposed to manually add our Memberstack subscriptions to Stripe so that they show up in the product catalog?