When it completely rolls out during this month, it's going to be tie-breaker which, supposedly, happens a lot more often than people think.
Additionally, it's not the Lighthouse score that you need to worry about, but WebVitals (FID, LCP, CLS) and only that for Field data, if your main concern is SEO.
Lighthouse is just a general tool that can hint you at performance issues.
Your performance affects SEO, and people take the Performance Score as measured by Google Lighthouse to be a proxy for how Googlebot will rank their site.
Additionally, it's not the Lighthouse score that you need to worry about, but WebVitals (FID, LCP, CLS) and only that for Field data, if your main concern is SEO.
Lighthouse is just a general tool that can hint you at performance issues.