Wefwef's performance measurement according to PageSpeed Insights. The web app performs fine on my budget device with only 1.5 Mbps internet speed, why is this?

i think it’s an inherent limitation of pagespeed, since wefwef is not serving 1st-party content. the first contentfull load will be after the backend wefwef queries responds, which in this case took several seconds. there’s nothing the client can do about that, except for changing backends