Rewrite with proxy gives 404 with Nuxt On SPA , But works when refreshing with the same URL

Am trying to make a rewrite using proxy to my another netlify instance from my deploy url, it does work with refresh but not when navigate through browser as SPA gives 404 , have a look at my redirect rule , can anyone please help to rewrite with same url to my another instance ?

DeployURL : , Click this url and try hitting on menu learn on nav bar that will through a 404 error but when u refresh the page loads with some content loading errors

Framework : Nuxt 2 with Static Site Generator

Case: I need to fetch blogs from secondary netilfy instance when user hits on blog in primary website or main domain

force = true
from = "/blog/*"
status = 200
to = ""