Lighthouse performance good on desktop, bad on mobile?

My new landing page is performing great on desktop but sometimes poorly on mobile and I'm unsure why.

I will get 99 for performance on desktop

desktop performance

But 87 on mobile

mobile performance

I'm using Netlify with built-in optimization. All of my images and .svgs are minimized.

Imgur

I'm only calling FullStory, Google Fonts, and UET tracking for Google and Microsoft which should all be very light.

In my mind, my website can't get any lighter, and yet I'm not in the green for performance?

Anyone else running into this issue?