I am working on a project to remove gtag based tracking from a website. We have concerns about not being able to implement tracking due to poor network connections. The ideal solution would be to handle conversion tracking on the backend when we receive a purchase request (so as not to send too many requests.) It seems that Google Analytics Measurement Protocol would be the correct tool for the job. However, this (somewhat frustrating) note mentions that "only partial reporting may be available."
We have explored server side GTM, but that still adds unwanted network requests and is not the approach we want to go for. It seems that there are workarounds such as in this question, but they seem pretty precarious. Is there any other api available, or approach that might fit the use case we are looking for?
