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Integrations (FB Pixel, Google Optimize) slowing down site too much

I have a client whos site with integrations scores a 75 speed test and without integrations in the low 90s. Is there a way to make these integrations not slow the site down so much?
They are using: Google Universal Analytics Tracking ID, Google Optimize, Facebook pixel.

Here is the site: https://try.hungrybark.com/
Here is the read only: Webflow - Hungry Bark Final Version