Search bar to display multiple categories in placeholder. See demo - https://imgur.com/a/9A2byvc

coolSearchPlaceholder.swift

import SwiftUI
import PlaygroundSupport

struct ContentView: View {

    // MARK: Private properties
    
    private var sections: [String] = ["restaurants", "groceries", "handpicked items", "convenience"]
    @State private var currentIndex = 0
    @State private var offsetY: CGFloat = 20
    
    // MARK: body
    
    var body: some View {
        textStackView
    }
    
    // MARK: Implementation
    
    private var textStackView: some View {
        HStack(spacing: .zero) {
            Text("Search for ")
                .font(.subheadline)
            Text(sections[currentIndex])
                .font(.headline)
                .offset(y: offsetY)
                .onAppear {
                    animate()
                }
                .clipped()
        }
        .padding()
        .frame(maxWidth: .infinity, alignment: .leading)
        .border(.gray)
    }
    
    private func animate() {
        // appear animation: transition the text to center from bottom edge
        withAnimation(.easeInOut(duration: 0.25)) {
            offsetY = 0
        }

        // disappear animation: transition the text to top from center.
        // Since there is no direct way to sequence the animation one after another, I have used delay to achieve similar effect.
        // delay_value = appear_animation_time(i.e. 0.25) + some_delay_so_that_user_can_read_the_text(i.e. 0.25)
        withAnimation(.easeInOut(duration: 0.25).delay(1)) {
            offsetY = -20
        }

        // After both appear and disappear animations are over (in 0.75 sec.), pick the next item. Reset the offsetY value and restart the animation.
        DispatchQueue.main.asyncAfter(deadline: .now() + 1.25) {
            currentIndex = (currentIndex + 1)%sections.count
            offsetY = 20
            animate()
        }
    }
}

// Present the view controller in the Live View window
PlaygroundPage.current.setLiveView(ContentView().frame(width: 375, height: 800))