SurveyData.cls

public class SurveyData {
    
    public class Survey {
        public List<Question> rows;
        //index must map with the isApplicable array
        public List<String>   allProducts;

        {
            rows = new List<Question>();
            allProducts = new List<String>();
        }
    }
    
    public class Question {
        public String id;
        public String team;
        public String question;
        List<Boolean> isApplicableForProduct;

        Question(String theTeam,String theQuestion, List<Boolean> isApplicable){
            this.team =  theTeam;
            this.question =  theQuestion;
            isApplicableForProduct = isApplicable;
            id = (team+'-'+question).replaceAll(' ', '-').toLowerCase();
        }
    }

    @AuraEnabled
    public static String fetchSurveyData(){
        try {
            Survey survey = new Survey();
            survey.allProducts = new List<String>{'Product 1','Product 2','Product 3'};
            survey.rows.add(
                new Question(
                        'Team 1'
                    ,   'Question 1'
                    ,   new List<Boolean>{ true, false, true}
                )
            );

            survey.rows.add(
                new Question(
                        'Team 1'
                    ,   'Question 2'
                    ,   new List<Boolean>{ true, true, true}
                )
            );


            survey.rows.add(
                new Question(
                        'Team 2'
                    ,   'Question 1'
                    ,   new List<Boolean>{ true, false, true}
                )
            );

            survey.rows.add(
                new Question(
                        'Team 2'
                    ,   'Question 2'
                    ,   new List<Boolean>{ true, false, true}
                )
            );
            
            return JSON.serializePretty(survey);

        } catch (Exception e) {
            throw new AuraHandledException(e.getMessage());
        }
    }
}

surveyData.html

<template>
    <template for:each={products} for:item="product">
        {product}
    </template>
    <template for:each={surveyData} for:item="row">
        <div key={row.id}>
            {row.team}
            {row.question}
            <template for:each={row.isApplicableForProduct} for:item="isApplicable">

                <template if:true={isApplicable}>
                    <span key={row.id}>
                        <lightning-input  type="checkbox" label="" name="input1" ></lightning-input>
                    </span>
                </template>

                <template if:false={isApplicable}>
                    <span key={row.id}> 
                        NA
                    </span>
                </template>
            </template>
        </div>
    </template>
</template>

surveyData.js

import { LightningElement,track } from 'lwc';


import submitPSVRequest          from '@salesforce/apex/SurveyData.fetchSurveyData';

export default class SurveyData extends LightningElement {

    @track
    surveyData = [];

    @track 
    products = [];

    connectedCallback(){
        this.fetchSurveyData();
    }

    fetchSurveyData(){
        
        submitPSVRequest().then((responseDataString) => {

            if( responseDataString ) {
                
                let data = JSON.parse(responseDataString);

                this.surveyData = data.rows;
                this.products   = data.allProducts;
            }            
            
        }).catch((error) => {

            console.error(error);
        });
    }
}