Shiny example app with dynamic number of plots with plot column width and auto align

app.r

library(shiny)
library(ggplot2)

ui <- shinyUI(fluidPage(
  navbarPage(
    windowTitle = "Automated EDA",
    title = "Automated EDA",
    collapsible = TRUE,
    
    tabPanel(title = "EDA",
             icon = icon("edit"),
             
             fluidRow(column(
               width = 12,
               uiOutput('univariate_plots')
             )))
  )
))
  
server <- function(input, output,session) {

  rv <- reactiveValues()
  
  observe({
    isolate({
      rv$data_filtered <- datasets::iris
    })
  })
  
  observeEvent(rv$data_filtered, {
    
    uniPlot <- lapply(names(rv$data_filtered), function(col_i){
      ggplot(rv$data_filtered, aes_string(x=col_i)) + geom_bar(fill = "#8cd3ff") + theme_classic() + labs(title = col_i) + xlab(col_i) + ylab("Count")
    })
    
    output$univariate_plots <- renderUI({
      
      plot_output_list <- lapply(seq_along(1:length(uniPlot)),function(plot_i){
        column(width = 6,
               tags$div(style = "margin-top: 10px; margin-bottom: 10px;",
                        plotOutput(outputId = paste0("uni_", plot_i))
               ))
      })
      
      # Convert the list to a tagList - this is necessary for the list of items to display properly.
      do.call(tagList, plot_output_list)
      
      ## either works
      # plot_output_list
      
    })
    
    rv$uniPlot <- uniPlot
  })
  
  observeEvent(rv$uniPlot,{
    
    lapply(seq_along(1:length(rv$uniPlot)), function(plot_i) {
      output[[paste0("uni_", plot_i)]] <- renderPlot({
        rv$uniPlot[[plot_i]]
      })
    })
    
  }, ignoreInit = FALSE)
  
}

shinyApp(ui, server)

On click of each plot - make it full screen