Hey @Doba-US
At this juncture I’d say it would a be good idea to contact Shopify Partner support directly to ask for a rate limit exemption, so that this can be handled through the regular Shopify support channels.
You’ll be able to contact support in your Partner Dashboard - (documentation to do so is here). They’ll ask about the app’s API usage and if the app is retrying any throttled 429 requests. Exemptions are granted but it’s dependent on the store/the app’s existing usage of the API. Hope that helps!