Starting from there (to be checked), shortage of equipment is not a thing: most routers are programmable computers, all we need to do is update the software to something that doesn't suck. And best of all, the customer doesn't even have to know. They just wake up one morning, and as if by magic, their Zoom/Meets/Hangouts calls suddenly work better.
Now if most home routers are not updated by the ISP… my condolences to your country I guess.
Edit: OK, real question: how does home routing actually work in the US? Who is responsible for what equipment, and for the ISP issued equipment, are there any relevant remote update capabilities, and if so are ISPs actually competent at doing updates?