r - flexdashboard isolate table for child Rmd - r

Question

I'm trying to incorporate an Rmd I have been using into a flexdashboard. I'm curious if it is possible to isolate an uploaded file and use it as-is rather than writing a bunch of reactive functions. If this is my template, is it possible to get a static object named df that the child document can go ahead and run with?
---
title: "help"
runtime: shiny
output:
flexdashboard::flex_dashboard:
orientation: columns
---
```{r}
fileInput("data", "select data")
df <- isolate(input$data)
```
```{r, child="some_code.Rmd"}
```
My real example does something completely different but let's say some_code.Rmd looks like this:
---
title: "some code"
output: html_document
---
```{r packages, include=FALSE}
knitr::opts_chunk$set(echo = FALSE, message = FALSE)
library(tidyverse)
```
The data looks like this:
```{r}
as_tibble(df)
```
The numeric data can be summarized with the following means
```{r}
df |>
summarise(across(where(is.numeric), mean)) |>
gather()
```

Answer 1

This ended up working:
knitr::knit() + markdown::markdownToHTML() + HTML() ---> renderUI()
---
title: "help"
runtime: shiny
output:
flexdashboard::flex_dashboard:
orientation: rows
---
Sidebar {.sidebar}
==============================================
```{r file-input}
fileInput("data", "select data")
```
Row
==============================================
```{r knit-child}
observeEvent(input$data, {
df <- isolate(read.csv(input$data$datapath))
new_env <- list2env(list(df = df))
output$res <- renderUI({
knitr::knit("some_code.Rmd", quiet = TRUE, envir = new_env) |>
markdown::markdownToHTML() |>
HTML()
})
})
uiOutput("res")
```