I ran another Page Speed Insights (PSI) scan of your homepage and it’s scoring really well (55-60 on mobile). For reference, we typically see Shopify stores score in the range of 10-30. So your website is scoring well above average.
Based on the report, it doesn’t look like much could be done to greatly optimize your site any further. I’d just make sure to avoid installing too many apps (doesn’t look like you have many installed) and if you uninstall any, you want to ensure the app’s code is actually removed from your theme. A lot of times, uninstalled app code will remain in your theme even after the app has been removed.
Shopify sites tend to score badly on Google’s PSI tool. That’s just the nature of using the platform. We have a few articles you can check out if you’d like to learn more: