Rails 6 Session Data Not Persisting

I've been battling this for about 24 hours now, and nothing I'm finding in my searches is leading to a solution.

My issue is my session data is not persisting and I can not log in to my app. Everything worked in Dev mode, but has not yet worked in Production. I'm using a Rails 6 Api hosted on Heroku and a React front end. I can successfully make the api call, find the user, and log them in using (I use "puts" to help me log the session at that instance. The session hash has a session_id and user_id at this point):

def login!
    session[:user_id] = @user.id
    puts "login_session: #{session.to_hash}"
end

After this the app redirects to the user page or an admin page depending on the users authorization.

When the redirect happens that the user or admin page calls the api to see if the user is authorized using:

def logged_in?
    puts "logged_in_session: #{session.to_hash}"
    !!session[:user_id]
end

The session is empty. Here is my sessions controller:

class SessionsController < ApplicationController

def create
    @user = User.find_by(email: session_params[:email])
    puts @user.inspect
    if @user && @user.authenticate(session_params[:password])
        
      login!
      render json: {
        logged_in: true,
        user: UserSerializer.new(@user)
      }
    else
      render json: { 
        status: 401,
        errors: ['no such user', 'verify credentials and try again or signup']
      }
    end
end


def is_logged_in?
    if logged_in? && current_user
      render json: {
        logged_in: true,
        user: UserSerializer.new(current_user)
      }
    else
      render json: {
        logged_in: false,
        message: 'no such user or you need to login'
      }
    end
end

def is_authorized_user?
    
    user = User.find(params[:user_id][:id])
    
    if user == current_user
        render json: {
            authorized: true
        }
    else
        render json:{
            authorized: false
        }
    end
end


def destroy
    logout!
    render json: {
      status: 200,
      logged_out: true
    }
end

def omniauth
  @user = User.from_omniauth(auth)
  @user.save
  login!
  render json: UserSerializer.new(@user)
end

private

def session_params
    params.require(:user).permit(:username, :email, :password)
end

def auth
    
    request.env['omniauth.auth']
end

Would any be able to point me the right direction??

Thank you